THE AMKKICAN SPHCIKS ()! ADHLIMIOMVI A 

 lii:K(iK()Tll (TIIH LlD.i: Dll'l.) 



CHARLI'i; }'. AI.KXAMiKH 

 ITII VCA, NEW YORK* 



Till' .small si/.i' ol l\u- iraiU'-Hifs cunstitiitiriK tin- (ii-niis Atlilphomyia 

 UtTgr.' t'lititlt's tlu'in to tln' uhiih' of Miiro-liinnopliilini. tin- majority of the 

 (It'scrihed forms Immhh much smallt-r tlum mi-mltrrs of allied Kfiicra. 



Some confuMon has arisen recently, repinlinn the identity of the most 

 common of the three known American species and the purpose- of th*- present 

 article is to straighten out this iml>roKlio. The first mention of an American 

 representative was in an article hy the author- in which « new species 

 niiiiula) was d«>scril)i'd and a second species referretl, provisionally, to the 

 widely-distrihutcd European form, nt iiilis llal. This latter spci-ies was af^in 

 mentioned, and its venation ligured in a second article' and here, alst), was 

 referred to si iiilis. There has always Iwcn a i|Uestion in my nnnd retrardin^ 

 the specific identity of tin- American and Kuropean forms and I have taken 

 the opportunity to send specimens to Mr. F. W. Kdwards, who kindly com- 

 pared the American s|M'cies with European specinn-ns of si nili.i in the Itritish 

 .Museum collection and reports that the two forms are ilistinct. I jjive a key 

 to the known American species and descrilie two new forms. 



American Species of Adelphomyia 



1. Wings with cell .Ml ahscnt. cayuga sp. n. 

 Wings with cell .Ml |)ri's<'nt. 2 



2. I'uhescence in cells of wings lacking or sparse; eross-vein r not 



evident; cros.s-vein hi short or ohiiterated : gt-neral color of Innly 

 pale yellow. miiiiila Alox.' 



I'uhescewe in c<'lls of wings i-onspicuous : cross-veins r and m 



distinct : hody color more lirownish. amiricaiin sp. n. 



Adelphomyia americana sp. n. 

 1!)11 A(l<li>h'iiii!iiii s) Iiilis Alexander. Can. Ent. 

 liUl Adilpliiiiiiiiin SI Iiilis A\exnmh'r. Ent. News. 



Small sjieeies (length, 9. 3.><-4 mm. i ; radial cross-vein present; cell Ml 

 pr<'sent ; plunv almo.st unieolorous. dull yellow. 

 i Length, 3.2-:}.r» mm. ; wing, 4.:J-4.(j mm. 

 K'oreleg, femur, 3.7 mm.; tihia. 4.1 mm.; tarsus, 3.8 mm. 

 .Middle leg. femur, 3.1) mm. 

 9 Length. 3.8-4 mm. : wing. .)-."). 3 mm. 



* Contribution from the EiilmuoliiKicil l.abor.itory, Cornell I'niversitv. 

 1 Bergroth; .Mitthcil. Naturl. Gesell. Hern; p. 134; 1«91. 

 2. Alexander; Canad. Kntoni.: .Aug 1911. 

 3. Alexander; Entomol. News; Oct. 1911. 



