104

Bulletin of the BrooklynEntomologicalSociety Vol.XIL,

NEW NEARCTIC SPECIES OF THE GENUS ERIOPTERAMEIGEN (TIPULID.?D, DIPTERA).
By Csenr,Bs P. ArrxeNnEn, Urbana, Ills.
During the past few years, several netv speciesof the genus
Erioptera l\{eigen have come to hand. Some of these have beencharacterizedin other papers,but a few still remain undescribed.
I\,Iost of these belong to, the group of E. chlorophylla O. 5., asmall assemrblageof specieswhose limits of distribution are still
not well understood. I am greatly indebted to 1\{r. Nathan Banksfor data on the types of E. chlorophylla, in the collection of theMuseum of Comparative Zoology, and to Mr. Johnson and Mr.
McAtee for specimensof the chlorophylla group. Unless statedotherwise the types of the new speciesare contained in the author's collection.
Erioptera margarita new species.
Male.-Length, S.8-+mm.; wing, 5.3-5.6mm.
Fentale._Length,4 mm.; wing, 4.8mm.
Antenna with the basal segmentslight yellow, the flagellumbrown;
flagellarsegments
cylindrical,rather elongate,with coarseverticils. Headyellowish.
Mesonotumreddishbrown, the lateral marginsand the humeralregion
yellow. Wings pale yellowish,the costal region more suffused;stigma
indistinct,palebrown; veinsbrown. Venationalmostas in E. microcellula
Alex., cell first M" closed,very small; secondanal vein straighgdiverging
from the first anal vein; basaldeflectionoI Cu, immediatelybefore thefork of.M.
Male hypopygiumwith thepleuritesshortand stout,the dorsalangleproducedcaudadinto a pale fleshylobe that is sparselyprovidedwith coarse
seta. Pleural appendages
two in number,the large one complex,bifid,
the outer arm producedinto a long,slightlycurved,chitinizedpoint whosesurface is coveredwith very minute appressedteeth; the inner arm abroad,flattenedchitinizedbladewith the apex truncated,in its angle atthe basewith a single conspicuous
blackenedconicalpoint; the smaller
pleuralappendage
is a slenderarm whoseacutechitinizedapex is curved
slightlycaudad. The gonaphyses
consistof six blackenedchitinizedhooks,
a lateral pair that are very widely separated,
the tips chitinizedand covered with microscopicteeth. The four intermediatehooks consistof apairof median slender, acutely .pointed rods that are smooth, almoststraight, with the tips contiguous or slightly decussate, Besides the above

June,rgrg Bultetin of theBrookl5,n EntomologicalSociety105

there is a transverse flattened plate
whose lateral angles are produced
into stout, curved chitinizedhooks that are ilr"cteO proximad;
the posterior median portion of this plateis stilr further produced into a smalt,flattened bifid blade.
The female is similar to the malebut the abdominal tergites are darker.
the ovipositor is very long, especialry
the tergal varves whichsfigr,ttv
upcurved at their tips.
"reHabitat.-Colorado.
Holotype, d, Platte Caffon, altitude
ro,ooo feet, August zg, rgt5 (8,J.
Oslar).
Allotopotype,l.
Paratopotype, d, August 2r, rgrsi paratlles,
z d,s, Colorado Springs,
June 8, r9r5 (M. C. Van Duzee).
A paratype is in the col,lectionof Mr. Van Duzee.
rnargarita is close to E. mi,crocellula.
.
Alex.
Erioptera(proc.

Acad. Nat. Sci. phila., for tgr4, p.5g5),
but the structure ofth-emale hypopygium is different. -rn-riicrocerura
theoutef afm
of the_appendage is blunt and. sparsely
hairy at the ape*, theinner flattened blade with a groupof s;all te;th h ;;r;;;;;;:stead-of a single powerful conicaltooth. The gonapophy-sesof
E. microcellulahave numerous appressed
teeth along their mar_gins. E. luci,uAlex., a third memberof this group, is a very dif_ferent fly and needs no comparison
with this new species.'It is
probable that these three speciesbelong
to the group of Erioptera
triaialis Meigen, of Europe, deviatinf
from the general charac_ters of the subgenus Erioptera in theoften closed cell rst M,
the straight second anal vein and amore or less tumid second
antennal segment.
T nn ctrtonoptyLLA Gnoup.
As stated in the introduction to thisarticle, several species
were f'ound to be confused under thename of.Erioptera ,hloro_
phylla o' s. It wiil be necessary
to review the specimensin thedifferent museums to get a clear
idea of the distribution of thespecies.
The speciesknown to the writer may
be separated in accord_
ance with the following key:lQ6

Bulletin of the Brooklyn Entom,ologicalSociety Vol. XItl

r. Eyes of the male very large, broadly contiguous beneath, narrowlyseparatedby the vertex above; male hypopygium with the trvo pleuralappendagesgenerally similar to one another, slender, tapering to theacute and slightly curved tips; female ovipositor short, stronglycurved, the tergal valves blackened and minutely serrate along theventral margin. . .. .,8, chlorophylloi.d,?rn. sp.
Eyes of the male smaller, widely separatedby the vertex I male hypopygium with the two pleural appendagesdissimilar in appearance,thedorsal one more or less flattened, the ventral appendageslender witha perpendicularspine at or near the tip; female ovipositor, of thespeciesas known, long, but slightty curved, the tergal valves pale andrvith th e ven tral m ar gin s m oot h.
..........2z. The ventral pleural appendageof the male hypdpygium witl-r a very longspine some distance belore the tip to form a fork with nearly equalarms or the spine slightly exceedingthe actual tip...E. furcifier n. sp.
The ventral pleural appendageof the male hypopygium with the spinesmaller, located at the extreme tip or small and situated slightly backf rom the a pe x,the f or k ed appear anc note s o ev iden t .
.......3
3. Spine of the ventral pleural appendageof the male hypopygium small,shorter than the width of the blade at this pqint, located some distance
before the tip of the appendage and shorter than the enlarged tip
beyond it; gonapophysesof either side produced into a blackened divergent horn ..
.8. chlorophyllo O. S.
Spine of the ventral pleural appendageof the male hypopygium longer,
located at the tip of the appendage; gonapophysesin the form offlattened paddle-like blades whose outer margins are minutely serrate . . .
. .. ..8. subchlorophylian. sp.

Erioptera chlorophylloitlesnew species.
Male.-Length, 4.5 mm.; wing, 5.8-6 mm.
Fem.ale.-Length, 5 mm.; wing, 6.&6.9 mm.
Rostrum and palpi green. Antenna green, the terminal flagellar segments a little darker. Eyes of the male very large, broadly contiguous on
the ventral side of the head, separatedby the narrow vertex above.
lhe thorax and abdomen,including the halteres, wings and their veins
light green as in E. chlorofhylla. Legs yellowish, the segmentstipped withgreen. Male hypopygium with the pleurites more slender than in chlorophllla, the two pleural appendagesgenerally similar to one another insize and form but the dorsal one a little shorter than the ventral or innerone. The appendagestaper gradually to the acute blackened tips which
are curved, the outer or dorsal appendagea little less curved than theother and with an indistinct appressedtooth before.the tip. Gonapophyses
with a powerful curved blackenedhook on either side of the penis-guard.
The female is similar to the male but somewhat larger, the ovipositor
small, with the tergal valves comparatively short, strongly upcurved andJune,rgrg Bulletin of the Brooklyn Entotnological Society

l0Twith the ventral margin minutely serrate; they are dark in color, contrasting with the small green, sharply pointed sternal valves.
H abitat.-Northern North America.
Hotrotype,d, Clear Creek, Colorado, May 25, rq;-l (E. J. Oslar).
Allotopotype,9, July r, r9r5,Paratopotypes, r8 d 9, May z5-July 27, rgrs; parat!)pes,z g], parry
Sound, Ontario (H. S. Parish).
Eriopterachlorophylla

Osten Sacken.

t859, Erioptera cJxloropllylla Osten Sacken, proc. Acad. Nat.
Sci. Phila. for 1859, p. 226.
In the type series as now representedin the Museum of Comparative
Zoology are three specimens,a male from Bethel, Maine, which is chosen
as the lectotype,a female and a broken specimen. I am indebted to Mr.
Banks for the above data.
The male hypopygium has the pleurites much stouter than in cl,tlorophylloid,es;the dorsal pleural appendageis a little 1ongerthan the ventral,of nearly equal width for the entire length or the apex a very little expanded,obliquely truncated, with the extreme outer angle blackened. The
shorter and more sle'rder ventral 4ppendage is suddenly flattened andexpandedat the tip, on the caudal or outer margin before the apex with asmall, usually slender, blackened spine which is shorter than the width of
the blade at this point. The tip bevond this spine is sometimesblackenedand, in the type, one of the appendagesappears claw-like. Gonapophyses
small, each side consisting of a ffattened plate whose inner posterior angle
is produced strongly laterad into a short blackenedhorn whose tip is thus
strongly divergentfrom its mate of the oppositeside; the penis-guardhas
a slender arm on either side which form a collar-like structure passing
beneath the hooks of the gonapophyses.
Lectotyfe, Bethel, Maine (Miss Edmands); Blue Hills, Massachusetts,
July 16 (C. W. Johnson); SacandagaPark, New york, June 18, r9r4 (C.
P. Alexander); near Philadelphia,Pennsylvania (C. W. Johnson).

Erioptera subchlorophyllanew species.
Generally similar to E. chlorophylla. Male hypopygium with the pleuralappendagesvery dissimilar in shape,the dorsal one expanded into a flattened blade at its apex; ventral appendageshorter and more slender, atthe extreme tip with a long, stout blackened spine, dir.ectedcaudad andplaced at right angles to the appendage. Gonapophys.escomplex, the 1ateral chitinized arms slender, at the tips expanded into flattened paddle-likeblades whose outer margin bears several minute acute teeth; horns of thepenis-guard curved, projecting slightly beyond the level of the gonapophyses.
Holotype, J, Riverton, New Jersey, June 3, rgro (C. W. Johnson).

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Bu.lletin of the Brooklyn Entomological Society Vot.XIV

Associated with this male type were several fernales whichhave an ovipositor of the type of E. chlorophyttoid,esand it ispossible that the female ol E. subchlorophylla is similar to thatspecies. Specimens in copula should be pinned together when
captured.
Erioptera furcifer new species.
Generallysimilarto E. chlorophyllo.Male hypopygiumwith the pleuralappendagesvery dissimilar in shape; dorsal appendageslender, broadest
and flattened at the base, narrowed to the blunt rounded apex which isheavily chitinized. Ventral pleural appendageslender, on the outer (posterior) margin far before the tip a very long, slender,blacked spine whichis almost straight, the proximal face with subappressedhairs, the tip
blackened. The slender tip of the appendagebeyond this spine is a little
shorter than the spine itself, the two appearing as a forked apex to theappendage,diverging at an angle of about r25". Penis-guard as in thegroup, at the apex on either side with a long recurved chitinized hook;gonapophysesin caustic potash mounts, pale, flattened, the distal portion
only a little wider than the base,the outer margin with minute teeth which
extend down to about midlength of the gonapophyse.
Ilolotype, J, Plummer's Island, Maryland, June 24, rya9 (H. S. Barber).
Of the above species, E. chlorophylla and E. chlorophyttoid,esform one group of species, E. subchlorolth^vlta and E.
fwrcif er asecond group, separated by the form of the gonapophyses.

Mr. Edmund H. Gibson has resigned from the U. S. Bureau ofEntomoiogy to enter upon a new field of endeavor. Ile believes
that entomology can be put on a dignified professional businessbasis just as law, medicine or engineering. He is breaking awayfrom custom believing that after the pioneer work is in hand thefield will weicome other entomologists. N{r. Gibson's headquarters, for the time being, lvill be Alexandria, Virginia.

Gerris argenticollisParshleyoriginally describedfrom Massachusettswas taken in White Plains,N. Y., April zg, rgr7.
I. R. nr LA ToRRE-BuENo.