156 NEW YORK STATK MTSKI'M 



it appears to me that tho name slum Id Im retained for species 

 having this character. 



KEY TO SPECIES OF TANYPUS 



Imagines 



a Wings clouded (banded or spotted) 



h Legs nearly uniform in color; wings uniformly spotted with fuscous; 

 thorax with three dusky stripes; legs yellow; length 4.5 mm. ; 



female A b 1 a b e s m y i a p i c t i p e n n i s 



lili Legs distinctly bicolored. Femora brownish with white subapical 



rings; abdomen blackish (New York and Texas) ... .1. s t e 1 1 a t u s 



a Wings not clouded, excepting sometimes the crossveins or a faint smoki- 



ness near apical end; dusky species 



/> Ilalteres pale fuscous; blackish species: legs sordidly yellowish 

 brown; wings grayish, hairy; tibia long-haired; thorax dark; abdo- 

 men somewhat shining and fuscous haired ; anterior crossvein in the 

 middle of wing; length 2.5mm. (Greenland) 



I'l. A b 1 a b e s m y i a t i b i a 1 i s 

 1>1> Not as above 

 c Scutellum black ; legs usually brownish or black 



il Apical half of wing smoky ; abdomen brown. .4. c u 1 i c i f o r m i s 

 tlil Apical half of wing not smoky 



Thorax gray with black stripes; abdomen cinereous black; 

 M-Ou cross vein far proximad of the fork of the cubitus ; ha)- 

 teres sordidly yellow; fore metatarsus but little more than 

 half as long as the tibia : length 2 to 3.25 mm. 



2. posticalis 



ee Thorax with lateral ferruginous stripes; crossveins clouded; 

 fore metatarsus about three fourths as long as its tibia ; 



length 4mm . 3. crassinervis 



cc Scutellum yellowish; legs usually paler brown or yellow 



il Apical half of wing distinctly smoky, especially near the anterior 

 margin; abdomen dark brown; length 3.5 to 4.5 mm. (New 



York ) 4. culiciformis 



(Id Wing nearly hyaline ; abdomen with whitish incisures 



5. choreus 



The species p i c t i p e n n i s and t i b i a 1 i s Staeger 

 have been included in the foregoing as well as in the key for 

 A b 1 a b e s in y i a because there is some doubt as to the posi- 

 tion of the M-Cu. crossvein. They are, however, described with 

 Ablabesmyia. 



Tanypus tibialis Say (G) and T any pus balti- 

 moreus Macq. (7) are not sufficiently described to place in 

 the keys; both of these descriptions are reproduced in the body 

 of this work. Tanypus annulatus is a synonym of 

 A. mouilis, and T. decedens Walker is perhaps the 

 same as pictipennis Zett. 



