138 NEW YORK STATE MUSEUM 



ee Wing with two cross bands and tlie apex largely brown, these 

 bands containing hyaline spots ; apices of femora and tibiae 

 slightly darkened; length 3 nnn. (New Hampshire) (com- 

 pare d y a r i ) 14. discolor 



aa Wings not clouded excepting sometimes the crossvein or a faint smoki- 

 ness near the apical end 

 6 Pale species 

 c Species over 3 mm. in length 



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



dtl Abdomen, at least of the male, with brown fasciae 

 c Thoracic stripes, metanotuni, and sternum browm 



IG. f 1 a V 1 f r o n s n. sp. 



ce Thoracic sti-ipes, etc., yellow 24. n 1 g r o p u n c t a t a 



CG Species less than 2.5 mm. in length 



d Thorax not striped ; pale yellow species 



c Length 1.5 to 2 mm., front metatarsus nearly as long as its tibia ; 



(St Vincent Island) 17. f 1 a v e o 1 a 



ee Length 1 mm., basal cells of wing short (D. C. ) 



20. p 11 o s e 1 1 a 

 dd Thorax with longitudinal stripes 



e Abdomen pale yellow ; the male with segments two to five with 

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

 segments pale brownish ; mouth parts brown ; Rj present near 

 the tip of Ri ; length 1.25 to 2.5 mm. (New Mexico). (A 

 variety with yellow mouth parts from New York.) 



IS. p a 1 1 e n s 

 ee Not as above ; basal cells of wing short 



f Species 1.5 to 2.25 nun. 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 

 /■/■ Species 1 mm. in length (Washington, D. C.) 



20. p i 1 o s e 1 1 a 

 && Dai'ker species 



c rialteres pale fuscous ; blackish ; logs sordidly yellowish brown ; 

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

 fuscous haired; the R-M crossvein near the middle of the wing; 



length 2.5 mm. (Greenland) 21. tibialis Staeger 



CG Not as above 



d Length 3 mm. ; metatarsus about 0.(5 as long as the tibia ; halteres 



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



dd Length 3.5 to 4 nnn. ; halteres luteous 23. h i r t i p e n n i s 



1. Ablabesmyia pictipennis Zetterstedt 

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

 1878 T any pus O. S. Cat'l. Dipt. 22 



Female. Fuscous bl;ick, jiilosc; llio IIh»i-;ix willi thrw^ dusky 

 stripes; llie winc;'^ Avliito, unifoiiiily sprinklod with fuscous clouds; 

 the halteres white; the legs yellow. Length -t.o mm. This species 



