1, $*'a--cI" ' l ,;"{ lrA

1912Povoxe Cor.Lpcr JosRNer. or Extouor.ocv,

VoL. rV, No. 3, DpcnMsen.

TIIE A]I{ERICAN SPECTESOF ADELPHOMYIA
tsERGROTII (TTPULID.E DrPT.)
CII.\RLES P. AI.F\TANDEIi
ITI.IJ.C,T. NEW YOBK*TIre srrrall size oi the cranc,-flies constituting the genvs aclelpltontyin:.1 eutitles thenr to the namc of Jlicro-limnophiliui, the majority of theibed ftrrnrs lNring ruuch s'raller tlian rne'rbers of ailied genera.
sorne conl'usion has arisrn rrcentll-, regartling the identity of the nostof the tlrree knorrn
species ancl the purpose of the prescnt'\rrrt,r'ican
i$'tiele is to straighten out tl-ris irnbroglio. The first prention 6f an American
resentatiye rras jn an articlc by the autirori in which a ne\r* speciesinzlo) u'a.sclcsc,rib.tl antl a second species referred, provisionally, to thetridely-distrilnrtcd European fornr, sr,rri/r'.r
HaI. This latter species u.as again
ionecl, and its vcnation {igured iu a second article3 and here. also. rvas
to sorilis. There has al*'a1's been a cluestion in my mincl regard.ing
specific itltntity oi' the Aruerican ancl European forrns and f have taken
opportunitl' to serrtl speciniens to llr. F. \\-. Eclwards. .ivho kindly cornred the Atrterican slrcciesrvith European specimensof sarih.- in the tsritish
neuur coliet:tion auci reports that tire tn-o fonrrs are clistinct. I gir.e a ke;,
the knou'rr Arnr:rican sn'.,,:jesantl clescrilrr,tn.o ps1,,.forms.
American Species of Adelphomyia
Wings n'ith cell :\ll absent.

:iWings with ceil ltl pre.sent.

c&augasp.n.
2'Pubescenc:ein cells of n'ings iaeliing or sparse; eross-\'ein r not:l' evident; cross-t'ein,r short or obiiteratccl; generai color of body
pale .u*el1orr.
,ninuta Alex.,'',Pubesceucejn c:,eilsof u.ings conspicuous; cross-reinsr and "rtr. distinct: b<ldy eolor nrore brol'njsh.
anericana sp. n.
Adelphomyia americana sp. n.
;:,;l:1911 Ack,lphnntyia sr,rrrli,sAlexaucler. Can. Ent.
iI"911
Aclclflnmyin sc,rrili.s
Alexauder. Ent. News.
Smati spec,ies(length, g, ii.8-4 rt''.); radial cross-veinpresent; cell IIl; plurrr ahnost unicoiorous, ciull yellotv.
l'6 Length. 3.2-3.5rum.: rring. 4.8-4.6rnm.
fr:ruur. 3.7 urrrr.: tilria. {.1 rnnr.l tarsus, 3.g mm.
'!torelr,'g.
leg. 1 ' r,n ru r.
l J .{ }rrrrrr.
^\ lir ic lle? Lengh , 3 .8 -{ rrrrrr.:l ri u g . 5 -5 .3 rrrm .
,t ,u,rC' rognr torri Jblu: r i on f r o r n tlr c Iiu tr ,lr r .l,,g ica l Laboratory, Cornell University.
\ir u r i.
Gc.cll. Be r n : p . 1 3 4 ; 1 8 9 1 .
; . ' t l c x a n d e r : -\jir r ir e il.
C:in a d . E.n to n r .: _ \u s. 1 9 1Lt r t e x a n d e r ; En r o m o l. \e u .s:
Oct. 1 9 1 1 .
,o.

Pouox-r Cor,r,nor Jounx'u' opEwrouor'ocv

light brown' Frontbrou'nish-yellow; antennie
Rostrunr and palpi lightsparse greyish bloom'
t''ot'''oisir-yellow' lvith avertex and occ:iput tiittt
apparentstripes'

rathershining'without
Thoracicr,**"t"il'n i"il i'uuu"''
Pleur* uniformdull yello*'
si'rilariy eolored.
sr.tur', scuterl'nr,",r';;;;i.ur
antl trochantersdull brorrnishI;egs-Coxae
Elalterespale,unifiortttii"oltgltorrt'
apicallv; tibire and tarsi uniforma"tn'"tdvello* r femora .tt^t';;;':Ji;"iitvc'ation (Figurehyaline.*eins lisht bro*'n'nl,norirrlus*
its tip;
Lrc*nis'-1,ello*,.
l1n8' se' far removedfromr.";.i-s:'-^;:iofform
260. A, cr D't.
theheyonilr;n R2 at't'ut ilt :tt" P*l""J:
hairs inerr;ss-vtinr prt'stnt' io"'"t"t
Short
fll'gvo55-1'sin]11+2 be'vondR2+3: l[1 trtrieh*rtt'li*t-tf'oo
the distal cr:]lsof the s'ing'","ti "tBFigure 260
A lr c lom i n a l te rg u n rb ro rv n .rr-i th a n a l.ro\r' darker,nredi anl i neandtt
nar r o\ \ - pleur a l b a o a o rth e s a me .o l o " ;* t." o unrpal eyel l os' ,al mostcon-rt';Aus'.t"';T;lJ,l:,ti".tt;ff1';lliilX""n.,co.,N.y.; art.1650
Furton22. lCl}.

(Ale'xancler, coll')

wood1e11;
rule-28'
R''
Sacandagars',
Ttttriir'
itllilft.l;J]t'l';*'Jri.";

Johusto'tt"';;;;"
r-ortlt's Lake. Gioversvijleantl
1911'
kins C'o..N. Y'; Septeurber'Co'' N' Y';lthaca'*i$;:#l*:l"T ti s Natllus' cornerr,,,,,1i',1,?J,lcolk:ctiotl.
I'niversitp: ancl in author'sn of antaricann
for the follorting conparlsot
Edu'artls
llr'
I am indellted towith the EuroPean sen'ilis:Pouox.r Cor;,ncs JorrnNer,or Exrouor,oey

831
The pleure in a. am.ericoreareunieolorous
oehreous;in-d".senilis they
are reddis'-brorvnabo'e and belo*, moreochreousin the middre.
2' Tht' marginal cross-veinis presentin
a. am.e.rica^a,absenttn a. senitis.
3. The genitaria are d.ifferentin the t*.ospeciesbut as we have only one
nrale,r do not rvant t'dissect it, without u-hichr"uoooi properiy makeout the strueture.,,"1'

Adelphomyia cayuga sp. n.
Large species(length. 9, 5 rn'r.); radialeross-veinindistinct; celr 1\{1absent.
e. length 5 mm.r wing J.l mm.
palpi and antennrulight brorvn. Front,
verter and occiput
o.o#tt"ror'Thoracicpr:escuturnunifo.u right bro*.n
without apparent dorsarstripes;
scutum,. scuterium and postnatum lighter-coloredpleura lightbrorvnish-1'ellow,brighter colored oo tiiu nretapleurre'ato*.
and on theportions of the uresopleurr. Legs ratheruniforn light brorrn thr.ughout.
'wings'osteriorrather uniformly suffused *ith dark,n,emi,i"ne disiinctly d.arker
eoloredthan in ailrcricanaar ildnrda; veinsrightbrorne. venation (Fig're 260,B)-scr rather long,aboutfive timesas longas sc2; R2fB in a line.*-ithRp;cross-veinr not evident; basal deflectionof R4fi in a rine ,n-;th,"u"r_ouior-m; cell lll absent,i. e., II1 and lI2
fused to the *ing_margin. A shortpubescencein the apical portions of t'e *'ing, tipsof cellsRl, R^g,Rg, R5, ],I2and II3 being ineluded.
Abdourinaltergum and sternum uniformly
brorvn.
Holot-vpe 9 (balsam slide). \'anishing Brook,Ithaca, N. y.i Aug. 16,7912. (Alexancler,coll.)
Type in author's collection.