THE MYCE;T0PHILID.5i OF NORTH AMERICA. 233 



2. Diadocidia borcalis Coquillett. 

 1900. borcalis Coquillett, Proc. Wash. Acad. Sciences. II. 390. 



Male. Length 4 mm. Head and antennae dark brown, two 

 basal joints of the latter, also the proboscis and palpi, yellow ; 

 thorax polished, yellow, the dorsum, except the front corners, 

 dark brown ; scutellum yellow ; metanotum brown ; abdomen 

 dark brown, slightly polished, its hairs yellowish ; coxse and 

 femora light yellow, tibiae and tarsi brown, front tarsi slender ; 

 knob of halteres yellowish brown; wings hyaline, densely cov- 

 ered with short hairs, subcostal cross vein present, tip of Ri about 

 opposite apex of anterior branch of the cubitus. Lowe Inlet. 

 B. C. 



4. Subfamily Ceroplatin.t:. 

 CcropIatin<r, Winnertz. A^erh. Zool. — bot. Ges. Wien. XIII. 684. 



1863. 



The primary distinction possessed by the members of this 

 subfamily is found in the wing venation. The R — M crossvein 

 is obliterated by the coalescence of a section of the basal portion 

 of the radius and media at the point where the crossvein usually 

 is. The antennae are short, usually thickened, and often more 

 or less flattened. P}a^^<i^y'^L^^ /^^ri 



Table of Genera. ' <^^'^'' "'"'^'•^ 



a. Face and proboscis prolonged, beak-like or snout-like, 

 (figs. 46, 49 and 87). , I. Asindulum. 



aa. Proboscis short, not beak-like. 



b. Antennas very much flattened, strap-like ; palpi porrect, 

 not incurved (figs. 47, 48). 

 c. R2+3 ends in Ri (fig. 82). 2. Ceroplatus. 



cc. R2-I-3 ends in the costa (fig. 83); -" ^.Cerotelion. i. 

 bb. Antennae not conspicuously flattened, palpi incurved, 



and moderately elongate. 

 , c. Media arises at the base of the wing, basal section 

 may be delicate and fold-like, 

 d. R--I-3 ends in the costa (fig. 89). 



4. Hesperodes. 

 dd. R:+3 ends in Ri (fig. 88). 5. Apemon.- 



cc. Media apparently arises at the crossveins ; i. e., its 

 basal section wanting (figs. 84, 85, 86). 

 poL^V^^^-*-*^ / '^J^I^W 6. Platyura. 



