bluuebunny/crossref_metadata_2025_split huggingface dataset:
Diurnal Activity in the Dusky Cockroach, Ectobius lapponicus L. (Blattodea)
Authors: Dreisig Hans 
Published: July 2010

AbstractThe activity of the cockroach Ectobius lapponicus was found to differ in males and females in the field, the males being active during the afternoon, the females after sunset. The difference was thought to be due to an inhibition by low temperatures in the males, displacing the activity towards an earlier period of the day. This is in accordance with a theory concerning sensitization, and different thresholds of release dependent on light and temperature as established for the stridulation in Orthoptera Ensifera and the locomotion in a domestic cockroach. A relationship between the amount of activity and the relative humidity was found in the nymphs. Laboratory experiments showed that the activity at constant temperature was released by a change from light to darkness. If low temperatures were applied during the dark period, the activity was displaced to the latter half of the light period. The influence of illumination on the activity was investigated, a faint illumination being more favourable than total darkness.
The Behaviour of Locusta migratoria R.&F. (Salt., Arcidiidae) in Relation to Simple Visual Stimuli at Different Radiation Intensities
Authors: Gärdefors Dag 
Published: July 2010

AbstractThe relation between radiation intensity and visual preferences in Locusta migratoria was tested with four different types of visual stimuli. At high radiation intensity, the strongest preference was for black and at low radiation intensity for vertical lines. The possible ecological significance of the preferences demonstrated is discussed.
Süsswassertardigraden aus Nordeuropa
Authors: Mihelcic Franz 
Published: July 2010

AbstractThe distribution and ecology of Tardigrada in interstitial habitats in northern Europe is discussed. Known results point only to species of the genera Macrobiotus and Hypsibíus (fam. Macrobiotidae) as being psammophilous. Fourteen species were found; of these six belong to the genus Macrobiotus and eight to Hypsibius. Three species from each genus are new. Adaptations of true freshwater Tardigrada are discussed, the major aspect of which is the development of prehensile claws.
Taxonomic Notes on Scandinavian Species of the Genus Sargus Fabr. (Dipt., Stratiomyidae)
Authors: Andersson Hugo 
Published: July 2010

AbstractThe type series of Sargus species described from Scandinavia by P. F. Wahlberg and J. W. Zetterstedt have been studied and lectotypes designated. S. rufipes Wahlb. is a species related to S. splendens Meig. but distinctly different. The differences are described and the male genitalia figured. The established synonymy S. nubeculosus Zett.=S. cuprarius L. has been confirmed. S. nigripes Zett. is a synonym of S. splendens Meig. (syn. nov.). S. minimus Zett. has been fixed by lectotype designation as a synonym of S. cuprarius L.
The Re-isolation of Neoaplectana bibionis Bovien (Nematodea) from Danish Bibionids (Diptera) and Their Possible Use as Biological Control Agents
Authors: Lindhardt K. , Poinar George O. 
Published: July 2010

AbstractIn. the spring of I97I, Neoaplectana bibionis Bovien was re-isolated from larvae and pupae of Bibio hortulanus L. and other bibionids from 3 localities in Denmark. Third stage infective larvae were recovered and used to initiate laboratory cultures. When nematodes were injected into the mouth of the greater wax moth larvae, Galleria mellonella L., they quickly penetrated into the hemocoel of the living insects and brought about their death. Successive nematode generations also occurred on artificial media used for rearing Neoaplectana carpocapsae Weiser. A specific rod-shaped bacterium was isolated from the intestine of infective stage larvae and probably has the same relationship to the nematode as N. carpocapsae has to its symbiotic bacterium, Achromobacter nematophilus. This nematode may make an excellent candidate for biological control programs involving soil insects.
Notes on Scandinavian Platypalpus (Dipt., Empididae) with Description of Four New Species and New Synonymies
Authors: Chvala Milan 
Published: July 2010

AbstractFour Scandinavian species of Platypalpus Macq. are described as new to science, viz., P. hackmani sp.n. (=P. brevicornis (Zett.) sensu Frey, 1913, 1943), P. longicornioides sp.n., P. scandinavicus sp.n. and P. tuomikoskii sp.n. The male of P. zetterstedti Chv. is described for the first time and P. subbrevis (Frey) is redescribed. Some new synonymies are established: P. interjectus (Lundbeck, 1910) is a synonym of P. difficilis (Frey, 1907), P. acroleucus Frey, 1943 of P. leucothrix (Strobl, 1910), P. calcaratus (Collin, 1926) of P. pseudociliaris (Strobl, 1910), P. agillelus (Collin, 1926) of P. pallidicoxa (Frey, 1913), and P. tantulus (Collin, 1926) is a synonym of P. cryptospina (Frey, 1909). P. varius Walk. sensu Lundbeck, 1910 is P. analis (Meig., 1830), P. nigrosetosus (Str.) sensu Frey, 1943 is P. agilis (Meig., 1822), and P. microcerus Frey, 1943 is a species of the genus Tachydromia.
On the Taxonomy of Extra-Palaearctic Histeridae (Coleoptera)
Authors: Kryzhanovskij O.L. 
Published: July 2010

AbstractThe following taxa are described in the paper: Omalodini trib.nov. (type genus Omalodes Er., Neotropical realm); genera Notosaprinus gen.nov. (type species Saprinus irinus Mars., Australia), Coomanister gen.nov. (type species Xestipyge scrobípygum Coom., Viet-nam), Neosantalus gen. nov. (type species Hister latitibius Mars., South-East Asia), and four new species from South-East Asia. The generic name Santalus Lew., I906, is considered a synonym of Pachylister Lew., I904. Data are given about the taxonomy and distribution of some poorly known species.
Drei neue Hydrocyphon-Arten aus dem Mittelmeergebiet (Coleoptera)1
Authors: Nyholm Tord 
Published: July 2010

AbstractThree new species of the genus Hydrocyphon Redtb. from the Mediterranean area are described, H. vicinans and H. segrex from south-east Turkey (the former also found in Israel), and H. hamiota from southern Spain. The two first-mentioned species belong to the australis-group, which is characterized by the aedoeagus being symmetrically built throughout. H. vicinans is very closely related to the Cyprian species oblongulus Nyh., while H. segrex takes a more isolated position within the group. H. hamiota belongs to those species In which the ventral-piece of aedoeagus is strongly asymmetric with only one medial appendage (prosthema) developed (the pallidicollisgroup), and its nearest relative is H. laeticolor Nyh., which has also merely been found in the south of Spain so far.
The Identity of Corticaria orbicollis Mannerheim from Alaska (Col., Lathridiidae)
Authors: Johnson Colin 
Published: July 2010

AbstractA lectotype and paralectotype of Corticaria orbicollis Mannerheim I853 from Alaska are designated, and the species shown to be identical with the Fennoscandian munsteri Strand I937 (syn. nov.). It is suggested that columbia Fall I899 from British Columbia might also be the same species.
Sexual Cycle, and Changes in Feeding Activity and Fat Body Size in Relation to Migration in Lygaeus equestris (L.) (Het., Lygaeidae)
Authors: Solbreck Christer 
Published: July 2010

AbstractDissections were made throughout the year of the migrant bug Lygaeus equestris (L.). The state of ovary development and fat body size was classified and presence of food in the stomach was noted. Seasonal mating frequence was observed in the field. The findings are discussed with respect to the migratory periods of the bug.
Two Amblystogeniuln Species (Col. Carabidae) Co-Existing on the Subantarctic Possession Island, Crozet Islands
Authors: Davies Lewis 
Published: July 2010

AbstractPit-fall trapping in fell-field habitat at about I00 m a.s. on the sub-antarctic Possession Island, Crozet Islands, showed that surface activity in Amblystogenium minimum Luff (Carabidae) fell suddenly to low levels after mating was largely completed in mid-February. In A. pacificum (Putzeys) also a fall in activity occurred at the same time but this species continued limited activity into late autumn. Both species are autumn breeders, with the last named continuing some egg maturation into the winter. A. minimum of smaller body size had ripe oocytes of smaller mean length than the larger A. pacificum which occurred as brown and black coloured adults. Collecting-out of areas of known size when the two species co-existed gave the following density estimates /m2: on stone and gravel ground about 0.7, and on rock pavement of 2.3 of each species. Comparison of pit-fall trapped samples with that of hand collected material suggest that A. minimum showed no differences between the sexes in overall activity, while in A. pacificum males were more active than females. The latter, larger species was more active than the smaller A. minimum. Limited larval material together with the occurrence of teneral adults in low numbers in February-April suggest an unsynchronized larval life lasting a year or more, and unsynchronized emergence in late summer and autumn of adults that do not breed until the following late summer, so that the total life cycle takes two years or more.
Subspecific Differentiation and Distribution of the Fleas Palaeopsylla soricis (Dale) and Malaraeus penicilliger (Grube) in Fennoscandia
Authors: Brinck-Lindroth Gunvor 
Published: July 2010

AbstractThe Soricid flea Falaeopsylla soricis (Dale, I878) and the Microtine flea Malaraeus penicilliger (Grube, I85I) have both been split into several subspecies, some of which occur in Fennoscandia. Their status and supposed immigration routes to the Scandinavian Peninsula in relation to their host animals are discussed and their distribution in this area is recorded.
Preparation of Alcohol-Preserved Larvae of Culicidae (Diptera) for Scanning Electron Microscopy
Authors: Dahl Christine 
Published: July 2010

AbstractA method for preparation of alcohol-preserved culicid larvae for Scanning Electron Microscope (SEM) studies is described. It is based on dehydration by ethanol-xylol and fast evaporation of xylol in +8o° C. for ten minutes. For taxonomic studies such as examination of pecten teeth, comb scales and microtrichiae in magnifications up to 6oooX the method is suitable. For studies of receptor structures on hair-tufts and microstructures of the body integument alcohol preserved material is less satisfactory. The microstructure of the comb scales is figured and their function discussed. Differences in the ultrastructure of the abdominal hair-tufts are pointed out.
Field Observations on the Seasonal Occurrence of Lygaeus eguestris (L.) (Het., Lygaeidae) with Special Reference to Food Plant Phenology
Authors: Kugelberg Otto , Solbreck Christer 
Published: July 2010

AbstractLygaeus equestris breeds in open areas. It overwinters in the adult stage, and in the autumn and spring it undertakes migratory flights to and from its hibernation sites. It feeds on the generative parts of a variety of plants. During I969 the population trends of L. equestris and of the flower and seed production of its food plants were studied in eight habitats. High numbers of L. equestris always coincided with peaks in flowering or seed production of the food plants. The spring migration was simultaneous with the start of flowering of the earliest food plants. The autumn migration, however, started when food resources still seemed ample. During the summer, nonmigratory (trivial) flights were important for the bug to keep pace with the changes in food availability. In I970 the distribution of food resources was quite different to that in I969, and consequently the invasion of habitats followed a different pattern. Four periods of flight were recognized: (I) postteneral trivial flights, (2) autumn migration, (3) spring migration, and (4) trivial flights of overwintered bugs. Possible causes of the different types of flight are outlined. The dispersal capacities of the bug are regarded as adaptations to the temporariness of its habitats. The implications of the flight movements on the population dynamics of L. equestris are briefly discussed.
A Late-glacial Insect Fauna from Red Moss, Lancashire, England
Authors: Ashworth Allan C. 
Published: July 2010

AbstractThe Red Moss deposits rest in a hollow which began to collect organic sediments I2,ooo years ago. The sediments, moss peat, sandy organic mud and Phragmites peat, yielded abundant wellpreserved insect remains. The species are all living today but many no longer in the British Isles. The fauna of the Late-glacial environment is one of an open and exposed bog but by Post-glacial time this had been superseded by a fauna of shrub and tree-covered wetland. Other changes in faunal composition have been observed which are thought to have been caused by oscillating thermal conditions. A series of colder and warmer episodes has been postulated which may be broadly correlated to the palynologically inferred climatic history of the Late-glacial. A marked faunal change was observed between the Late- and Post-glacial episodes and it is estimated that summer temperatures rose from IO° C to I6° C in a period of 3o to 45o years based on radiocarbon dating. Faunal changes are independent of lithological boundaries, which, because of the largely organic nature of the sediments, are vegetation controlled and this is thought to demonstrate the more positive response of insects to climatic change.
Similarities between the Dufour Gland Secretions of the Ants Camponotus ligniperda (Latr.) and Camponotus herculeanus (L.) (Hym.)
Authors: Löfqvist Jan , Bergström Gunnar 
Published: July 2010

AbstractThe two ant species Camponotus ligniperda ,(Latr.) and Camponotus herculeanus (L.) show very small differences in morphology and general biology. The present work demonstrates that the two species are very similar also with respect to the composition of the volatile secretions emanating from Dufour's gland in worker ants. As in other formicine ant species analysed by us earlier, the main components are straight chain, satured hydrocarbons with II, I3, I5 and I7 carbons atoms. Tridecane is the dominating component. Unsatured, straight chain hydrocarbons and branched chain, saturated hydrocarbons are also present. We have also identified aliphatic alcohols, ketones and acetates as components of the secretion from Dufour's gland, as well as a11-trans-farnesyl acetate and one isomer of farnesene in trace amounts. Of these compounds hexadecyl acetate is the dominating one. The analyses have been carried out by combined gas chromatography and mass spectrometry and by capillary gas chromatography. In both techniques we have been using a precolumn for isolating the volatile compounds.
Östliche Kiefern-Buschhornblattwespe (Gilpinia verticalis Guss.), ein für Schweden neuer Forstschädling
Authors: Hedqvist Karl-Johan 
Published: July 2010

AbstractDuring the year I957 a species of Saw flies new to Sweden, Gilpinia verticalis Guss., appeared in the province of Medelpad in North Sweden. The species had attacked Scotch Pine planted on an area of about 200 acres. After a discussion of the taxonomic position of G. verticalis in relation to genus Diprion Geoffr. (s. lat.), the author reports about the biology. He also gives an account of predators and hymenopterous parasites. Finally he is treating G. verticalis from an economical standpoint.
Seasonal Polymorphism and Developmental Changes in Organs of Flight and Reproduction in Bivoltine Pondskaters (Hem. Gerridae)
Authors: Møller Andersen N. 
Published: July 2010

AbstractThe seasonal changes in the frequency of long-winged individuals and individuals with reduced flight organs in bivoltine populations of Gerris lacustris (L.) and odontogaster Zett. were investigated by means of regular sampling of adults and rearings of nymphs. Both species have a high frequency of short-winged individuals in the first generation. During the late summer and autumn there is an increase in lacustris nymphs moulting into short-winged adults, while nearly all odontogaster become long-winged. The females of the early summer generation have reduced ventral pigmentation and attain reproductive maturity just after their final moult. Their offspring—the partial second generation—together with the nonreproducing adults of the late summer generation constitute the overwintering population. During the teneral development of newly moulted, long-winged adults lasting for one or two weeks there is a nearly fourfold increase in the mean fibre diameter of flight muscles, a significant growth of the thoracic phragmata, and a pigmentation of mesonotum associated with the development of flight ability. The flight muscles are histolysed during the period of reproductive activity in spring. These observations promote a new hypothesis regarding the adaptive significance of alary polymorphism in aquatic Hemiptera.
Neue Beiträge zur Kenntnis der Tenebrioniden-Fauna von Afghanistan (Coleoptera)
Authors: Kaszab Zoltán 
Published: July 2010

AbstractThe author identified the Tenebrionids (Coleoptera) collected in I962 by Dr. K. Lindberg in Afghanistan. The material contained 85 taxa (species and subspecies). Two are new to Afghanistan (Gnathosia jacobsoni, Pisterotarsa gigantea) while 8 species and 4 subspecies are here described for the first time (Gnathosia brincki, Microdera charpentieri, Adesmia jugalis septentrionalis, Lasiostola bendamira, L. linnei, Thriptera dubia, Pachyscelis klapperichi imitata, Pimelia semenovi saroubiana, Platynoscelis subalpestris, P. lindbergi, Dendarus transcaspicus afghanicus and Luprops afghanicus). A new subspecies of Dendarus transcaspicus is described from Transcaspia. The differences between Trachyderma christophi, Thryptera freyi, T. gracillima and T. dubia sp. nov. are clarified and a key to the Afghanistanian species of the subgenus Platynoscelis s. str. is given, establishing changes in the status of Trichomyatis cylindrica, T. rectangularis, T. hirtipennis and T. ovipennis by assigning these species to genus Platynoscelis.
Commentaires sur la terminologie de l'armure génitale chez les Lépidoptères
Authors: Niculescu Eugen V. 
Published: July 2010

AbstractIn this paper, the author critically discusses the terminology concerning the genital armature in Lepidoptera, with particular reference to the works of Diakonoff, Sibatani and Klots (in Tuxen). It is considered that present-day terminology comprises too many terms (about goo) and that great confusion arises, due to the numerous synonymous and homonymous terms and to the adoption of vernacular terms, as well as of terms referring to minor structures. At the end, the author states several principles which ought to be adopted, with a view to supplying order to terminology and to elucidating it.
A Peculiar Kind of Pigment Cell in the Compound Eye of Lepisma saccharina L. (Thysanura)
Authors: Elofsson Rolf 
Published: July 2010

AbstractThe ultrastructure of the primary pigment cells of the compound eye of Lepisma saccharina is described. The cells are four in number. The pigment granules are contained in fingerlike protrusions from the pigment cells. These protrusions project into the enlarged basal lamina surrounding the ommatidial top. The large basal lamina could have given the impression of a cell (called corneagen) in the light microscope.
Structure of the Alimentary and Reproductive Organs of Some Adult Neuroptera
Authors: Quartey S.Q. , Kumar R. 
Published: July 2010

AbstractMorphology of the alimentary organs was studied in Ascalaphus Fabr. cf. africanus (McL.) (Ascalaphidae); Myrmeleon obscurus Ramb., Neuroleon sp. and Palpares sp. (all Myrmeleontidae). The male reproductive organs were investigated in the Neuroleon sp., M. obscurus and Palpares sp., the female organs in the Neuroleon and Ascalaphus species. Details of the histology of alimentary organs in Neuroleon sp. and of the bulbus ejaculatorius in the Palpares sp. are given.
New Records of Vertagopus sarekensis (Wahlgren, I906) from Northern Scandinavia (Collembola, Isotomidae)
Authors: Fjellberg Arne 
Published: July 2010

AbstractVertagopus sarekensis (Wahlgren) was found on dry localities in alpine region in Northern Norway and Swedish Lappland, where it ascends to the highest mountain tops (2000 m a.s.l.). It is separated from V. westerlundi (Reuter), besides in colour, by morphological details of antenna, number of ventral setae of thorax and abdomen, shape of mucro and general clothing. Adults in reproductive phase show a distinct sexual dimorphism: Abdominal macrochaetae of the male are much shorter and thicker than in the female, and setae of the characteristically swollen frons are thick and thorn-like. A lectotype of V. sarekensis is designated.
Morphology of the Male Genitalia of Lepidoptera I. Ditrysia
Authors: Birket-Smith S.J.R. 
Published: July 2010

AbstractFrom the literature on onthogenesis it is concluded, that male genitalia with two pairs of appendices must be considered primitive. The male genitalia of a number of species from three families (Cossidae, Saturniidae, Brahmaeidae) in which the male genitalia comprise two pair of appendices, valvae and valvellae, were dissected. The results are compared to earlier studies of species of Lithosiinae (Arctidae). It is concluded, that morphologically must be distinguished between two types of intromittant organ, or phallos, viz. aedoeagus and pseudaedoeagus.
Studies on the Myrmecophilous Fly, Glabellula arctica (Zett.) (Dipt. Bombyliidae)
Authors: Andersson Hugo 
Published: July 2010

AbstractGlabellula arctica (Zett.) is recorded from three Swedish provinces as an ant guest, living in the nests of four Formica species. Some details of the behaviour of the adult and the larva are described as well as the morphology of the last larval instar, the pupa and the malc and fcmale abdomina. The systematic position of the species is discussed.
Gamasina Mites (Acari, Parasitiformes) from Nests of the Mole Talpa europaea L
Authors: Lundqvist Lars 
Published: July 2010

AbstractFrom Southern Sweden 2040 gamasina mites of 31 species were collected from 51 nests of Talpa europaea L. The taxicoenosis may be described as a Haemogamasinae—Euryparasitus emarginatus— Myonyssus rossicus acarocoenosis, dominated by Haemogamasus hirsutus. In most species more females than males were found and more adults than larvae and nymphs. In two species, Euryparasitus emarginatus and Parasitus niveus these ratios were different, e.g. ∼ 1.
Laboratory Studies on the Feeding Preference and Feeding Behaviour in Lygaeus equestris (L.) (Het. Lygaeidae)1
Authors: Kugelberg Otto 
Published: July 2010

AbstractThe seed-feeding bug Lygaeus equestris changes and extends its food plant spectrum during its life-cycle. Whether this is the result of only the natural succession of the food plants, or also includes a change in the insect's food preference during its life, was the primary question of the present paper. Feeding-choice tests using ripe seeds from important food plants in the laboratory showed that Cynanchum vincetoxicum seeds were preferred during all stages of life. Among the lesser preferred seeds tested, a shift in preference occurred during the bug's development. It seems probable that this shift may be due as much to the physical as to the chemical properties of the seeds. It is suggested that most of the other plant species exploited for feeding by L. equestris probably serve mainly as substitute food when suitable developmental stages of C. vincetoxicum are absent or in short supply. Furthermore the paper gives some notes on duration of feeding upon seeds and effects of seed coat at initiation of feeding on Cynanchum and Helianthus seeds. During the third larval instar, the preference switches from the endosperm to the seed coat for initiation of feeding on Cynanchum seeds, and so it remains during the following stages. On Helianthus seeds, only adult L. equestris feed as willingly through the coat as directly from the endosperm.