138 NEW YORK STATE MUSEUM 



ec Wing with t\vo cross bands and the apex largely brown, these 

 bauds containing hyaline spots; apices of femora and tibiae 

 slightly darkened ; length :; nun. ( New Hampshire) (com- 

 pare dyari) 14. discolor 



aa Wings not clouded excepting sometimes the m^svein of a faint smoki- 



ness near the apical end 

 b Pale species 

 c Species over 3 turn, in length 



d Wholly yellowish species 15. m e 1 a n o p s 



d'l Abdomen, at least of Hie male, with brown fasciae 

 C Thoracic stripes, metanotum. and sternum In-own 



1G. f 1 a v i f r o u s n. sp. 



ce Thoracic stripes, etc.. yellow - 1. n i g r<> p u n<- 1 a t a 



cc Species less than '_'.." mm. in length 



d Tliofax not striped; pale yellow >pc.-ies 



e Length 1.5 to - mm.. I'mnt metatarsus nearly as long as its tibia ; 



(St Vincent Island) IT. flaveola 



ee Length 1 nun., basal cells ..f win- short (D. C.) 



20. p i 1 o s e 1 1 a 

 <lil Thorax with longitudinal stripes 



6 Abdomen pale yellow; the male with se-meiits two to five with 

 a band near the base and nearly the whole of the following 

 segments pale brownish; month parts brown; 1L present near 

 the tip of HI; length 1. _'.' to _'..'. mm. (New Mexico). (A 

 variety with yellow mouth parts from New York.) 



18. p a 1 1 e u s 

 ee Not as above ; basal cells of wing short 



f Species 1.5 to 2.2.~> mm. long; abdomen brown with ashy pos- 

 terior margins to the segments; crossvein proximad of the 

 basal third of the wing (New York and St Vincent Island) 



19. i n d e c i s a 

 ff Species 1 mm. in length (Wellington, D. C.) 



20. p i 1 o s e 1 1 a 

 6& Darker species 



c Halteres pale fuscous; blackish; legs sordidly yellowish brown; 

 tibiae long-haired: thorax dark; abdomen somewhat shining and 

 fuscous haired; the R-M n-ossvein near the middle of the wing; 



length 2.5 mm. (Greenland) 21. t i b i a 1 i s Staeger 



cc Not as above 



d Length 3 mm. ; metatarsus about 0.6 as long as the tibia ; halteres 



white 22. f a s t u o s a n. sp. 



dd Length 3.5 to 4 mm. ; halteres luteous 23. hirtipennis 



1. Ablabesmyia pictipennis Zetterstedt 



1838 T any pus Zett. Ins. Lappon. SIS. (=? T. decedens Walker) 

 1S7S T a n y p u s O. S. Cat'l. Dipt. 22 



Female. Fuscous black, pilose; the thorax with three dusky 

 stripes ; the wings white, uniformly sprinkled with fuscous clouds ; 

 the halteres white; the legs yellow. Length 4.5 mm. This species 



