bluuebunny/crossref_metadata_2025_split huggingface dataset:
EFFECT OF THE LIVING HOST TREE (PICEA) ON THE RESPONSE OF DENDROCTONUS RUFIPENNIS (COLEOPTERA: SCOLYTIDAE) AND A PREDATOR THANASIMUS UNDATULUS (COLEOPTERA: CLERIDAE) TO FRONTALIN AND SEUDENOL
Authors: Dyer E. D. A. , Hall P. M. 
Published: December 2009

AbstractTwo synthetic pheromones, frontalin and seudenol, were tested on living host (Picea) trees and on non-host (Abies) trees to determine their relative attractiveness to the spruce beetle (Dendroctonus rufipennis) and a clerid predator (Thanasimus undatulus). On host trees, frontalin attracted significantly more spruce beetles and induced significantly more attacks on the trees than did seudenol. On non-host trees, more beetles and a higher male ratio were attracted to seudenol than to frontalin. Frontalin has a positive effect on the behavior of female spruce-beetle attack, whereas seudenol has not. The resulting natural secondary attraction of attacking female beetles creates strong aggregation of both sexes of spruce beetles on host trees (Picea) baited with frontalin, but not on host trees baited with seudenol or on non-host trees (Abies). The clerid predator (T. undatulus) was attracted to frontalin in significatnly larger numbers than to seudenol.
THE RELATIVE ACTIVITY AND FUNCTIONAL RESPONSE OF PHYTOSEIULUS PERSIMILIS (ACARINA: PHYTOSEIIDAE) AND TETRANYCHUS URTICAE (ACARINA: TETRANYCHIDAE): THE EFFECT OF TEMPERATURE
Authors: Everson P. 
Published: December 2009

AbstractThe activity of the predacious mite Phytoseiulus persimilis Athias-Henriot was greater oh a glass substrate than on a bean leaf substrate. Temperature did not affect its relative activity on the two substrates. The phytophagous mite Tetranychus urticae Koch was inactive on the bean leaf substrate. It was active on the glass substrate and its activity varied with temperature. The functional response of P. persimilis and T. urticae was examined at four temperatures (15°, 20°, 25°, 30 °C). Each functional response to increasing temperature rose curvilinearly to a plateau. From Holling’s disk equation, rate of successful search increased and handling time decreased.
DENDROCTONUS PONDEROSAE (COLEOPTERA: SCOLYTIDAE): PRE-AGGREGATION LANDING AND GALLERY INITIATION ON LODGEPOLE PINE
Authors: Hynum Barry G. , Berryman Alan A. 
Published: December 2009

AbstractLanding rates as monitored by landing traps indicate that the mountain pine beetle, Dendroctonus ponderosae Hopkins, is not attracted to lodgepole pine, Pinus contorta Dougl., prior to the first gallery start. Bark terpene odors and DBH were not correlated with beetle landing rates, with the exception of beta-phellandrene which accounted for a statistically significant 18% of the variation in landing rates. Beetles were unable to distinguish between hosts, dead hosts and nonhosts during landing. The elderberry pith bioassay indicated the presence of a gallery initiation stimulant in the bark.
GEOGRAPHIC DIFFERENTIATION IN THE DEVELOPMENT OF AEDES SIERRENSIS (DIPTERA: CULICIDAE) IN NATURE
Authors: Jordan Robert G. 
Published: December 2009

AbstractThe critical photoperiod for fourth instar diapause of the western treehole mosquito, Aedes sierrensis, varies among geographic populations. When reared together in the field at different latitudes, larvae from northern (ca. 45°N), central (ca. 39°N), and southern (ca. 33°N) populations all develop more rapidly through the early instars at more southerly latitudes. The order of pupation dates among the populations, however, depends on their critical photoperiods, and can be predicted from laboratory data on photoperiodism.
TWO NEW SPECIES OF MELANOTRICHUS REUTER FROM WESTERN CANADA AND A DESCRIPTION OF THE MALE OF M. ATRIPLICIS (HETEROPTERA: MIRIDAE)
Authors: Kelton Leonard A. 
Published: December 2009

AbstractTwo new species of Melanotrichus Reuter are described: wallisi from Saskatchewan, and elongatus from Alberta and Saskatchewan. The male genitalia of the new species and those of M. albocostatus Van Duzee and M. atriplicis Knight are illustrated.
DESCRIPTION OF A NEW SPECIES OFPARTHENICUSREUTER, NEW RECORDS OF HOLARCTIC ORTHOTYLINI IN CANADA, AND NEW SYNONYMY FORDIAPHNOCORIS PELLUCIDA(HETEROPTERA: MIRIDAE)
Authors: Kelton Leonard A. 
Published: December 2009

AbstractParthenicus brooksin. sp. is described and male genitalia illustrated.Cyrtorhinus caricis(Fallén) andFieberocapsus flaveolus(Reuter) are reported from Canada and North America respectively.Diaphnocoris pellucida(Uhler) is synonymized withD.provancheri(Burque).
LECTOTYPE DESIGNATION FOR IDOLOCORIS AGILIS, AND DESCRIPTIONS OF THREE NEW SPECIES OF DICYPHUS FIEBER FROM NORTH AMERICA (HETEROPTERA: MIRIDAE)
Authors: Kelton Leonard A. 
Published: December 2009

AbstractIdolocoris agilis Uhler is redescribed and a lectotype designated. Three new species of Dicyphus Fieber are described: confusus from Alberta, British Columbia, Colorado, and Idaho; similis from Alberta, British Columbia, Saskatchewan, Ontario, Quebec, New Brunswick, Nova Scotia, Newfoundland, New Hampshire, and New York; tibialis from Alberta, British Columbia, Colorado, and Montana, Left claspers of the four species are illustrated.
THE IDENTITY OFCALOTELEA OCULARISASHMEAD, 1894 (HYMENOPTERA, PROCTOTRUPOIDEA, SCELIONIDAE)
Authors: Masner Lubomir 
Published: December 2009

AbstractFive syntypes ofCalotelea ocularisAshmead were studied; a lectotype is selected and redescribed. Theocularis-species group ofCaloteleais proposed. The history of the type material of Caribbean species of Proctotrupoidea treated by Ashmead (inRileyet al. 1894) is briefly discussed.
FURTHER RELEASES OF LOPHYROPLECTUS LUTEATOR (HYMENOPTERA: ICHNEUMONIDAE), AN INTRODUCED PARASITE OF NEODIPRION SERTIFER (HYMENOPTERA: DIPRIONIDAE)
Authors: Griffiths K. J. , Lyons L. A. 
Published: December 2009

AbstractLophyroplectus luteator (Thunb.), a European ichneumonid parasite previously established on Neodiprion sertifer (Geoff.) in southwestern Ontario, was released near Hepworth, Ontario in 1970, on Manitoulin Island and in Sault Ste. Marie, Ontario in 1972. All three releases resulted in establishment. Data on attack levels and host densities are presented for up to 4 years after release. Dispersal within release areas was rapid. In the first generation after release on Manitoulin Island parasites were obtained up to 900 m from the release site.
RESPONSE OF FOUR LEAFROLLER SPECIES (LEPIDOPTERA: TORTRICIDAE) TO SEX ATTRACTANTS IN BRITISH COLUMBIA ORCHARDS
Authors: Madsen H. F. , Madsen B. J. 
Published: December 2009

AbstractThe sex pheromones of Archips argyrospilus (Walker), Archips rosanus (L.), Choristoneura rosaceana Harris, and Pandemis limitata Rob. were evaluated in orchards with the objective of developing a method of monitoring leafroller population densities. The sex pheromones were specific for three species but not for C. rosaceana. This leafroller was captured in traps containing A. rosanus sex pheromone more frequently than in traps with its own attractant. The trapping program indicated that C. rosaceana and P. limitata were abundant in the southern fruit growing region of British Columbia and that A. argyrospilus and A. rosanus were the predominant species in the northern region. The traps can be used to identify leafroller species in orchards and to indicate when moths are active which may help in timing control measures.
GENETIC INCOMPATIBILITY BETWEENPIERIS CALLIDICEANDPIERIS OCCIDENTALIS NELSONI: DIFFERENTIATION WITHIN A PERIGLACIAL RELICT COMPLEX (LEPIDOPTERA: PIERIDAE)
Authors: Shapiro Arthur M. 
Published: December 2009

AbstractPieris callidicefrom the French Alps was hybridized with the phenotypically similarP.occidentalis nelsonifrom Fairbanks, Alaska in order to examine the degree of genetic divergence within a group of Pleistocene origin. Egg hatch for the crossnelsonimale ×callidicefemale was zero. In the reciprocal cross, egg hatch was normal, but most of the larvae failed to feed on the normal host-plant ofnelsoni, and died. The hybrid pupae and the single adult were intermediate between the parents. It is inferred thatP.callidiceandP.o.nelsoniare more divergent genetically and physiologically than phenotypically.
RESISTANCE OF THE SPOTTED TENTIFORM LEAFMINER, PHYLLONORYCTER BLANCARDELLA (LEPIDOPTERA: GRACILLARIIDAE), TO ORGANOPHOSPHOROUS INSECTICIDES IN SOUTHERN ONTARIO
Authors: Pree D. J. , Hagley E. A. C. , Simpson C. M. , Hikichi A. 
Published: December 2009

AbstractPopulations of the spotted tentiform leafminer, Phyllonorycter blancardella (Fabr.), from sprayed orchards across southern Ontario were found highly resistant (about 160-fold at LC50) to azinphosmethyl. Cross resistance to phosmet and partial cross resistance to diazinon were also indicated. All populations were highly susceptible to several synthetic pyrethroid insecticides. Resistant populations were controlled with pyrethroid insecticides applied when eggs were first found or by methomyl applied at about 50% hatch.
PREDACEOUS MITES (ACARI) ASSOCIATED WITH APPLE FOLIAGE IN MAINE
Authors: Berkett Lorraine P. , Forsythe H. Y. 
Published: December 2009

AbstractTwenty species of predaceous mites were collected from apple foliage in Maine during a 2-year survey of commercial and abandoned orchards. Phytoseiids and stigmaeids comprised 97.3% of the total mites. The phytoseiid Amblyseius fallacis (Garman) was the predominant predaceous species in commercial orchards. Predaceous mites were collected in commercial orchards primarily in the latter part of the growing season following cessation of spraying. In abandoned orchards, the stigmaeid Agistemus fleschneri Summers was the most abundant predaceous mite, with the phytoseiids Phytoseius macropilis (Banks) and Typhlodromus pomi (Parrott) also frequently collected. In abandoned orchards, predaceous mites were collected throughout the season and were generally more abundant.
EFFECT OF THE PHYSICAL NATURE OF LEAF AND FRUIT SURFACES ON OVIPOSITION BY THE CODLING MOTH, CYDIA POMONELLA (LEPIDOPTERA: TORTRICIDAE)
Authors: Hagley Elmer A. C. , Bronskill J. F. , Ford Elizabeth J. 
Published: December 2009

AbstractThe upper and lower leaf surfaces of apple and the lower leaf surfaces of pear and peach leaves were the preferred oviposition sites of the codling moth, Cydia pomonella (L.). Eggs were not deposited close to the leaf midvein or on peach fruit where pubescence was heavy. However, the density of leaf hairs was not the only physical factor affecting egg deposition. The nature of the wax scales on some surfaces also appeared to influence the number of eggs deposited.
EPIBLEMA (NOTOCELIA) CYNOSBATELLA (LEPIDOPTERA: TORTRICIDAE), A RECENTLY INTRODUCED OLD WORLD SPECIES POTENTIALLY INJURIOUS TO ROSACEAE
Authors: Mutuura Akira 
Published: December 2009

AbstractEpiblema (Notocelia) cynosbatella (Linnaeus), introduced into British Columbia in 1978, is discussed and compared with the native North American Epiblema illotana (Walsingham).
DESCRIPTION D’UN GENRE NOUVEAU DE KEROPLATIDAE DE L’OUEST NORD-AMÉRICAIN (DIPTERA: MYCETOPHILOIDEA)
Authors: Matile Loïc , Vockeroth J. R. 
Published: December 2009

AbstractRobsonomyia reducta, new genus and new species, is described from males collected in British Columbia and California. Characters distinguishing it from other genera of Macrocerinae are discussed.
TWO PANDEMIS SPECIES INTRODUCED INTO BRITISH COLUMBIA, WITH A COMPARISON OF NATIVE NORTH AMERICAN SPECIES (LEPIDOPTERA: TORTRICIDAE)
Authors: Mutuura Akira 
Published: December 2009

AbstractTwo Pandemis species, introduced into British Columbia, are discussed: P. cerasana (Hübner) found in 1965 and P. heparana (Denis & Schiffermüller) found in 1978. They are compared with the native North American Pandemis pyrusana Kearfott and P. limitata (Robinson).
THE RELATIONSHIP BETWEEN LATITUDE AND THE EMERGENCE OF ALFALFA LEAFCUTTER BEES, MEGACHILE ROTUNDATA (HYMENOPTERA: MEGACHILIDAE)
Authors: Pankiw P. , Lieverse J. A. C. , Siemens B. 
Published: December 2009

AbstractStudies in Western Canada from 1974 to 1977 on variations in time and duration of the emergence period after diapause of leafcutter bees, Megachile rotundata (Fabricius), reared at latitudes ranging from 49°N to 58°N showed that bees reared at northern latitudes emerged sooner and the duration of the emergence period was shorter than for bees from the southern latitude. When southern bees were reared in the north, their emergence pattern was similar to the northern strain. However, the change of time to emerge and duration of emergence period of northern strains reared in the south was less pronounced. Number of days to emerge varied inversely with length of cold treatment at 4 °C with greater variance in southern strains.
INSECT FAUNA OF NESTS OF THE RED-WINGED BLACKBIRD,AGELAIUS PHOENICEUS, AT DELTA MARSH, MANITOBA
Authors: Hood Deborah E. , Welch H. E. 
Published: December 2009

AbstractFive red-winged blackbird nests were collected from Delta Marsh, Manitoba in June 1975 and examined for insect fauna. Three nests were examined in October 1975, and one in June 1976 for Siphonaptera and Calliphoridae. Two thousand five hundred and forty arthropod specimens of 68 insect species and a few undetermined species of Acarina were recovered. Of the insects, 65.5% were Diptera, 27.6% were Coleoptera, and the remainder were from six other orders. Blood feeding forms includedCulicoides crepuscularis(Diptera) andCeratophyllus garei(Siphonaptera). The fauna of these wet nests differed qualitatively and quantitatively from dry nests studied by others.
MATING BEHAVIOR OF RHAGOLETIS POMONELLA (DIPTERA: TEPHRITIDAE) VI. SITE OF EARLY-SEASON ENCOUNTERS
Authors: Smith D. Courtney , Prokopy Ronald J. 
Published: December 2009

AbstractField observations of Rhagoletis pomonella (Walsh) adults on apple and hawthorn trees revealed that mating encounters occur on leaves in early-season and shift to fruit with the onset of oviposition. Most matings on leaves are initiated from a male frontal approach to the female and most of those on fruit from a rear approach while the female is engaged in some phase of oviposition behavior. This suggests that matings on fruit may be forced matings with unreceptive females.
WESTERN RHYACIONIA (LEPIDOPTERA: TORTRICIDAE, OLETHREUTINAE) PINE TIP MOTHS TRAPPED USING SYNTHETIC SEX ATTRACTANTS
Authors: Stevens Robert E. , Sartwell Charles , Koerber Thomas W. , Daterman Gary E. , Sower Lonne L. , Powell Jerry A. 
Published: December 2009

AbstractSynthetic sex attractants were used to trap Rhyacionia pine tip moths throughout the western United States in spring and early summer 1977 and 1978. Some species were shown to have much wider distributions than previously known. Among species responding to (E)-9-dodecenyl acetate, R. zozana was collected over most of the area, with new records for Washington, Idaho, Montana, Wyoming, and South Dakota; R. neomexicana was found for the first time in Utah, as was R. salmonicolor in New Mexico, Colorado, and Utah; R. monophylliana in Nevada and Utah; R. jenningsi in New Mexico; and R. multilineata in Arizona and Oregon. Among species caught in traps baited with (E,E)-8,10 dodecadienyl acetate, R. busckana was found widely through the Northwest, for the first time in Montana and Wyoming, and R. fumosana was captured throughout the Rocky Mountain states, with new records for Montana, Utah, and Nevada. Sets of two previously unknown zozana -like moths were collected. One is closely associated with the typical form in Oregon and California; the other is a pinyon associate in Colorado and New Mexico.
AN EVALUATION OF THE USE OF ELYTRA AND BODIES IN X-RAY ENERGY-DISPERSIVE SPECTROSCOPIC STUDIES OF THE RED TURNIP BEETLE, ENTOMOSCELIS AMERICANA (COLEOPTERA: CHRYSOMELIDAE)
Authors: Turnock W. J. , Gerber G. H. , Sabourin D. U. 
Published: December 2009

AbstractSamples of the bodies and elytra of Entomoscelis americana Brown were analyzed separately by X-ray energy-dispersive spectroscopy. Discriminant analysis revealed that the chemoprints of the bodies of newly-emerged beetles (1 wk old) were distinct from those of post-aestivation beetles (9- to 10-wk old). However, the chemoprints of the elytra of newly-emerged and post-aestivation beetles were not as different as those of the bodies as demonstrated by the overlap in the plot of the first two canonical variables. The variances of the mean difference of individual variables between newly-emerged and post-aestivation groups generally were smaller for elytra than for bodies. This suggests that the chemoprints of the elytra of E. americana are more stable than those of the bodies and consequently the elytra should be more suitable than the bodies in insect dispersal studies utilizing the X-ray energy-dispersive spectroscopy technique.
NEW SPECIES OF TIPULIDAE FROM THE PALEOCENE OF CENTRAL ALBERTA, CANADA
Authors: Wighton Dennis C. 
Published: December 2009

AbstractThree new species of fossil Tipulidae are described. Pseudolimnophila speirsae n. sp. and Limnophila marklae n. sp. (subfamily Limoniinae, tribe Hexatomini) are represented by adults; Tipula tubifera n. sp. (subfamily Tipulinae, tribe Tipulini) is represented by a pupa. Six other pupae belong to the subfamily Tipulinae.
CONFIRMATION OF ULULODES QUADRIMACULATA IN CANADA (NEUROPTERA: ASCALAPHIDAE)
Authors: Garland J. A. , Marshall B. D. 
Published: December 2009

Ascalaphidae occur in Canada. Here, we document the presence of Ululodes quadrimaculata (Say) in southern Ontario, which was suspected by Kevan (1979).SPECIMEN MATERIAL. Ontario: ESSEX COUNTY: Harrow, ♀, VIII.1974 (W. Elliott; UG). LAMBTON COUNTY: Pinery Prov. Pk., ♂, 4.VII. 1977 (B. Marshall & W. Maddison; #770112b, ROM). MUSKOKA DISTRICT: Georgian Bay, Island #421, ♀, 5.VII. 1963 (J. P. Bogart; UG); Gravenhurst, ♀, 20.VIII. 1975 (D. J. Aspinall; UG); Muskoka, ♀, VIII.1957 (D. Barr; ROM).
INSECTICIDAL ACTIVITY AND PERSISTENCE OF PHORATE, PHORATE SULFOXIDE, AND PHORATE SULFONE IN SOILS
Authors: Harris C. R. , Chapman R. A. 
Published: December 2009

AbstractLaboratory tests indicated that phorate, phorate sulfoxide, and phorate sulfone were toxic contact insecticides with broad spectrum activity. In general, p. sulfoxide was most toxic to insects > p. sulfone > phorate. When compared with other insecticides using 24–48 h old field crickets, Acheta pennsylvanicus (Burmeister), as test insects, the three compounds were less toxic by direct contact than carbofuran and fensulfothion, but as or more toxic than aldrin. P. sulfoxide and p. sulfone were strongly inactivated in moist Plainfield sand and were not as insecticidally active in soil against crickets as phorate. Nevertheless, the sulfoxide arid sulfone in soil were intermediate in toxicity between carbofuran and fensulfothion. The insecticidal activity of phorate, p. sulfoxide, and p. sulfone in soil was influenced by soil type, moisture, and temperature. Fumigant toxicity tests indicated that the three compounds volatilized from soil. Chemical analysis showed p. sulfone was most persistent in sand and muck > p, sulfoxide > phorate. Oxidation was observed to be a major degradation reaction for phorate and p. sulfoxide in both soils. Parallel bioassay tests indicated that, in sand, the biological action of "phorate" was due to the joint action of the three compounds. In a field study phorate EC, applied as a broadcast application at 3.4 kg AI/ha and incorporated into the top 7–8 cm of soil was slightly more persistent in muck than in sand. More than 99% and 98% of the applied phorate and its oxidation products disappeared from the sand and muck, respectively, within a year of treatment, indicating that the residues were only moderately persistent under climatic conditions encountered in southwestern Ontario. Low residues of p. sulfoxide and p. sulfone were detected in radishes grown on both soils in the first year but none were present in the second year. No residues were detected in carrots grown on either soil.
BIONOMICS OF SCYMNUS MARGINICOLLIS (COLEOPTERA: COCCINELLIDAE)
Authors: Buntin Linda Anne , Tamaki George 
Published: December 2009

AbstractScymnus marginicollis Mannerheim was reared on green peach aphids, Myzus persicae (Sulzer). At 20°–25 °C and a 16-h photoperiod, durations of egg, larval, and pupal stages were about 5, 10, and 7 days, respectively. Adults survived more than 80 days. The ingestion of wax-producing prey was not required for the beetle larvae to produce their woolly wax covering. Larvae fed exclusively by sucking fluids from appendages of the aphid prey. The coccinellid consumed about 16 adult aphids during the larval stage. Adults fed on fluids and tissues of M. persicae. Female adults consumed about five aphids per day, nearly twice as many as did males. The beetle populations increased in July and reached peak abundance in August. The seasonal trend of S. marginicollis suggests one generation per year.
MORPHOLOGICAL RELATIONS OF SCLEROTIZED AND PIGMENTED AREAS OF LEPIDOPTEROUS LARVAE TO MUSCLE ATTACHMENTS, WITH APPLICATIONS TO LARVAL TAXONOMY
Authors: Mutuura Akira 
Published: December 2009

AbstractMorphological interpretations are given of sclerotized areas, such as the prothoracic shield, anal plate, and pinacula of lepidopterous larvae. Markings of these sclerotized areas which indicate the positions of muscle attachments are classified; new systematic names are suggested based on those of the corresponding muscles. The importance of sclerotized areas and markings for larval classification are shown by examples. These markings are used to distinguish certain closely related species of the genusChilo(Pyralidae).
THE LENTIC STONEFLIES (PLECOPTERA) FROM THE CONTINENTAL DIVIDE REGION OF SOUTHWESTERN CANADA
Authors: Donald D. B. , Anderson R. S. 
Published: December 2009

AbstractSeventeen species of Plecoptera were collected from 58 lakes situated along the Continental Divide in southwestern Canada. Four of the 17 species were found once. The commonest species was present in 25 lakes. At low to middle elevations stoneflies occurred in large lakes that had relatively low total dissolved solids and low maximum annual heat content. The distribution of the majority of species was restricted with respect to lake area and elevation. For example, some species were found only in large lakes at low to medium elevation (900 to 1700 m), while others were found only in small lakes at high elevation (1800 to 2400 m).
REVIEW OF THE NEARCTIC IDIOCERINI, EXCEPTING THOSE FROM THE SONORAN SUBREGION (RHYNCHOTA: HOMOPTERA: CICADELLIDAE)
Authors: Hamilton K. G. A. 
Published: December 2009

AbstractThe Nearctic Idiocerini exclusive of the fauna of the Sonoran subregion are reviewed. The 68 recognized species are assigned to three genera: Idiocerus Lewis, Rhytidodus Fieber, and Balcanocerus Maldonado-Capriles. Three subgenera of Idiocerus are recognized, including I. (Liocratus) Dub. and I. (Populicerus) Dlab. (n. stat). Sahlbergotettix Zvk., 1953, Viridicerus Dlab., 1974, Tremulicerus Dlab., 1974, and Acericerus Dlab., 1974 are synonymized with Idiocerus Lewis, 1834.Sixteen new species of Idiocerus are described: aureus, carolina, cedrus, freytagi, gillettei, immaculatus, inebrius, iodes, lucidae, midas, pericallis, taiga, unicolor, vanduzeei, venosus, and xanthiops. I. varions n. n. is created for varias DeLong & Hershberger, 1947 (nec Germar, 1818). I. lunaris Ball (n. stat.), I. obsoletus (Wlk.) (n. stat.), and I. raphus Freytag (n. stat.) are recognized as valid species for the first time. Twelve other species are removed from synonymy. I. verrucosus Ball is placed as a subspecies of I. musteus Ball (n. stat.). Five new synonymies are created: alnirubratus Bliven, 1955 = I. couleanus Ball & Pkr., 1946; nigrens DeL. & Cld., 1937 = I. distinctus Gill & Bak., 1895; duzeei Prov., 1890 and vagus Ball, 1902 = obsoletus Walker, 1851; and apertus DeL & Hbr., 1947 = I. verticis (Say), 1831.Additional characters of the male antennae, male abdominal apodemes, and female ovipositor are described and illustrated. The phylogeny and hosts of the members of Idiocerus are discussed. Keys are provided to the genera of the Nearctic Idiocerini, and to the species of Idiocerus of the Nearctic region, exclusive of the Sonoran subregion, for both sexes.