xxxvi, '25I

ENTOMOIOGICAL

NEWS200

Undescribed Speciesof Crane-Flies from the Eastern
United States and Canada(Dipt.: Tipulidae).
Part I.
By Cneu,ns P. Arex.rxonn, Amhelst, Massachusetts.*
The new species of crane-flies described at this time werechiefly included in extensive collections that were sent to me
by Professor J. Speed Rogsrs, head of the Department ofBiolory, University of Florida at Gainesville, Florida. Theflies are described at this time in order to make the names
available for the forthcoming state lists by Professor R.ogers.
I am very greatly indebted to the collector for many favors* Contribution from the Department of Entomology, Massachusetts
Agricultural College.

2AIENroN{oLocICALNEws[July' '25and kinrl co-operatior-rin making known the crane-flies of theEastern United States. The tvDes have been returned to Professor Rogers.
Antocha (Antocha) obtusa s1t.r.r.
General coloration ochreous. the rrtstrttm dark ; mesonotal
praescutum with a median brown stripe; wings with nllcroirichiae on the clistal sections of veins X'It * 2 antl A'[s; malehypopygium with the outer clististyle chitinized, the aPex
obtuse.
d. Length about 4.8 mnr.; wirrg 5.5 mm. 9. Length about
5.2 mm.; wing 6 mm.
Rostrunr dark brown, the palpi a trifle paler brown. Antennae dark brown throughout. Head grey, paler posteriorll'.
Pronotttm yellowish above, darker meclially. I'Iesonotum
palc yellowish nchreous, the praescutr-imwith a conspricuous
median brolvn stripe, clarkest in front, becoming pale-. llehind
before the sttture ; lateral stripes ';erv indisand obsolescet.rt
tirrct, reddish. Pieura recidish ochreo,us,in the fen'rirle very
sparsely pruinose. Halteres pale, the knobs a little infuscated.
Less with the coxae ancl trochanters testaceot.rsochreous;remainder of the legs pale brown, gradualiv darkening r:'.rtwarclly; the tarsi dark brown.
Wings opalescentwhitish, the veins brown; prearcular region
whitish. Macrotrichiae on distal three-fourths oI vein R+ * r
ancl on the distal sectionsol L[1f 2 and M3 almost throughout their length. Venation: Rz * 3 beneath the stigma very
faint, beyond the stigma with about four macrotrichiae.
Abclomen brown, the lateral margins of the segments a littlepaler, the subterminal segrnentsof the male clarkenedto forma ring; hypopygium and ovipositor pale. \{a1e hypop.vgium
with the distiityles about equal in length, the outer style chitinized for almost its lvhole length, bent at about one-third thelength, the long, straight terminal portion o;btuse at apex.
Gonapophyses profoundly bifid as in the genus, the lateralarr:aa flattened blade, the mesal arm more chitinized apically,slightly expanded before the tip, the apex terminating in along acute beak, the whole suggesting the head of a 'bird.
Aedeag"usdistinct.
Habitat.-Michigan, New York, Quebec. Holotype: d, Ann
Arbor, Washtenaw County, Michigan, August 24, l92l (I .
Speed Rogers); Coll. No. 12. Allotottotype, ?. Paratopo|1tpss, 3?. Paratypes, 1 d, Portage, Wyoming County, New

E N TO MO L O G I C A L

xxxvi, '25]

NEWS2023 2 9 , P . G o l {C l u b 'Y o rk ,N. I a y2 4 ,| 9 1 +( H . H . K n i g l l t ) ; 2wauvf in canadians'ouebec,August 142';:'ti+ fc
Iiational Collection'
described
told from the other
Antoch'a obtttsa is readily
elongate distitheofAmerican species ly ir-'Jld"tt"pitt'
styles of the male hYPoPvgittm'
Sacken'Ru'rpHrDoLAIlls OstenI)rcn.ruor't Zetterstedt ancls"?i3*5*':*;;,,;?ilffil'oll][: ;:,:tir;l,ii *,Ticharactet's;excellent
i J'''li"g"; ti"f .?l l1:r::tilttJ"Jn:r::#l"i'li,i"tsi'';:'."':11'#:1'!l[:q;l*i'"'.'-*if

iJa;:rip"'li'l?:lL'1Tfi:;:*ili;
irtil#tr.
l':Jl,:ii:.i;
h#trlr;irsl,;K:r;-lfii.;":'€i}::,i:f:;'.;i;;";','it'bugt'

moit species,bt"

low and obtuse'in 'r(* ihe slightlv pro-',:;*T1t'ff:;:*';1;1?l#J*,i,s
F*;t;fl';i;"1;J""p.i"ot":.:11::;rTi#j"'",rd':#:'1i1ti'liE1'ffi?"J.1',','i:""if3:;il';''*';;oiotherwise
lffi:'J::',ffil:m:iL:Xilii':;TtrJilil'Xffi'"f,'*i'":::il'ti$::f""1;
ill1*:":1
rlil:l,ryiti
lii5ll,lg':?;i,,lf,?il}*:ff:,iil"Ji"T.."1t,1i.'dJ""i'''i'u*i**,i:'X::

i.Lt:'it;25
itt' wt'1ru*f"i;1"''"-*?Yiil"'l'#{flf,?il':::1:J',ffi':J''i,'.t';..x'?i""!:arise from pale membraneat'thrs;;:,[Ti;l't"*
fu:t
Fu'1;"
I**lry;:*ik#l3i',"*n;; ;;;id;,.o", :,?Xif :i*i:1',,'.,#!\;,.;,, J. ;;;k,trroughof the tergite"na "pptuito

i#if#i:3r3'#kr'r*n,alll*iii+
ventral interbases

203'ENTox{oLocrc^I-NEws

fJaly,'25

in a more ventrai oositiorrat thc base of the mesal face of thebasistylcsancl seeir.rto bc ltonrokrgoitswith the claspettesol
as aerttral
tlre Culicidae ; in tl.rel)reselrt pl-rpcrtl'revare discLrssedinterbosesancl offer thc r-nostct.,rrvctricnt
arrcleviclentstructures
to be nsecl in the <lifferentiationof speciesin the Dicranotae.
In most forms stuclied they are larger tl.ran the dorsai interbases and appear as flattened blacles llc:rrilrg o11the face acertain number of sma1lsetae: the shape of thc blade varies
greatlv in the different species.in R. pcrsirrti,lisanl R. f orcefs
being deeply bifid or tong-shapeci. It shorrlrl be noted that insonre speciesol Dicranota ancl Rhophidolabis,one or both of
the interbasal processesappears to be lacking or at least reducecl to a microscopic tubercle. The gonapophysesusuaily
closeiv subtend the aecleagus,the phallosorneappearing as adepressed,compact, subcluadrate,central mass, with the lateralangles and the apex of the aedeagusfree.
Dicranota divaricata sp.n.
.
Related to D. noaeboracensisAlexancler, differing chieflt'
in the structure of the male hypopygium; ventral interbasal
proccssa slenderstraight rod with the apex obtuse; phallosome
rluaclrate, the gonapophyses rJirectecl caudad and laterad as
slenclerdiverger.rthorns.
d. Length 4.5 - 5 mm.; wing 6.3 - 7 mm. Rostrum andpalpi clark brown. Antennae short in both sexes, brownthroughout, the I1agellar segments a trifle palcr than the scape.
Heacl clear gray.
X'leso'notalpraescutum gray with four grayish brown stripes,
the long intermediate pair separated from one another by acapillary vitta; scutum gray, the centers of the lobes grayish
brorvn; scutellum light brown ; postnotum darker brown,
sparsely pruinose. Pleura dark brown, gray pruinose, thedorso-pieural membrane a little brighter. Haiteres brownish
testaceous,the base of the stem yellowish.
Legs with the coxae brownish gray, paler at tips; trochanters pale yellow; remainder of legs brown, the femoral
bases vaguely paler.
Wings with a very pale brown tinge, the slightly darker
stigma oval; veins darker brown. Venation: Sc1 extending to
one-third the distance between r and the outer deflection of R2 ;Rs feebly angulated; Rz * r a little longer than r; outer <1eflection of R2 slightly oblique in position, less than its iengthfrom the tip of Rr f z ; distance between r and the outercleflectionof R2 greater than the terminal section of R3 alone:celi r'1.{1present; rz absent; m-cu about its length beyond thef or k of M .

xxxvi ,' 2-51

ENTO\'IOLOGIC,\LNEWS

llasal ab<lorrrinal
tergites reddish brown, the more clistalsegturctttsclarker; caudal margins of the intermediate segmenisn;irrolvl)' and inconspicuonslyyellowish; sternites similar, thelateral margins.paler. Nlale hypopygium with the basistylesstr)r1t;ventral interbasal process a slender, straight rocl, -theapex obtuse. Phallosome a central quadrate mass, the caudolateral angles with the gonapophyses produced into slenderclivergent horns, the aedeagusi iitite longer and stouter, occupying a median position.
Habitat.-North Carolina. Holotype: d, Guilford College,Guilford County, X,{arch 13, 1918 (L Speed Rogers); Coll.
No. 31. Paratopotypes,33?, with the type: 1 d, March 11.
l ql S ; C ol l . N o. 30.
Rhaphidolabis (Rhaphidolabis) rogersiana sp.n...
d. Length about 5.5 mm.; wing 6 - 6.5 mnr. ?. Lengtir
6- mm.; wing 7 mm.
L-loselyallied to R. (R.) cqntta Alexancler,tc which species
it lr'ould run in existant keys.
General coloration dark gray, the rnesonotalpraescntum withthree still darker leaden.gray stripes. Wings'with a peculiar
nrilky-white_tinge,the stigma pale^brown;,rdir-,sdarkeibrown.
\ exatton : L'ell R3 sessile or very short petioiate.
'different
f rom R. cayuga.
. .nl3l. . hypopygium strikingly
Xledian lobe of ninth tergite bioad hut longer. produced-ap"e-xo{ basistyle with relativg"ly few .pin.r. dorsal i"t".nu*r'uppearing as slender chitiniz-edrods ihat are bent at a right angie
before the tips, the extreme apex deflecteclinto a frawk-liie
beak. !-entral interbases appearing as long, flattened, simple
blades,.broad at base, narrowed gLdually Io the obtuse ape*
which is microscopicallyserrulate-.
Habi,tat.-Michigan. Holoiype: d, Gogebic County, August
9, 1920 (1. Speed Rogers); Coll. No. 72. Attotofotype: 9,Paratopoil,fes: 2 33, August 10, 1920; Coll. No. 73; 1 ?.
Augrrst lI, 1920; Coll. No. 81.
This interestir.rgcrane-fly is named in honor of the collector.
Pro{essor James Speed Rogers, who has done much torvarcl
making known the crane-flies of Eastern North America.
(To be continued)