MAY FLIES AND IMIDGES OF NEW YORK 159 



1818 T a 11 y p u s Meig. Syst. Besclir. 1 : G3, 13 



1850 T a n y p u s Zett. Dipt. Scand. 9 : 3610, 17 



1864 T a n y p u s Schin. Fauna Austr. 2 : 617 



1877 T a n y p u s V. d. Wulp. Dipt. Neeii. 299, 4 



1826 T a n y p u s f a s c i a t u s Macq. Rec. Soc. Sc. Agri. Lille. 187, 5 



1838 T a n y p u s tenuis INIeig. Syst. Bescbr. 7 : 15, 34 



Male. Head dark brown, including mouth parts and antennae. 

 Dorsum of the thorax with three dark ibrown stripes, the middle 

 one divided by a fine line. Humeri and scutellum yellowish 

 brown, sternum and metanotum and sometimes scutellum also, 

 blackish; the pleura a little paler. Abdomen dark brown, the 

 posterior margins of the segments paler, more yellowish; hairs 

 brown. Genitalia short and robust (pl.32, fig.2). Legs yellowish 

 or brownish; the tips of the femora, tibiae, and all the tarsal 

 joints darker. The metatarsus usually yellowish. Fourth tar- 

 sal joint linear and longer than the fifth; the fore metatarsus 

 about one fourth shorter than the tibia; the fore tarsi and the 

 posterior legs somewhat hairy, wings hairy, hyaline, the apical 

 half smok}^, especiall}' near the anterior margin; crossveins dark 

 clouded, El with R, near its tip, the petiole of the cubitus about 

 one half as long as the fork (pi. 27, fig.15). Halteres white. 



Female. Antennae except apical joint yellowish ; the humeri 

 paler and the legs less hairy than in the male. Lrength 3.5-4.5 mm. 



A numiber of specimens from Ithaca, N. Y., one from Riverton, 

 N. J., one from Idaho, and one from Chicago, 111., I cannot dis- 

 tinguish from European specimens. 



5. Tanypus choreus Meigen 

 1804 Tanypus Meigen. Klass. 1:23,6 

 1818 Tanypus Meigen. Syst. Beschr. 1:62,12 



1839 Tanypus choreus Meig. Staeger. Nat. Tids. 2 :585, 7 

 1850 Tanypus Meig. Zett. Dipt. Scand. 9 :3609, 15 



1864 Tanypus Meig. Schin. Fauna Austi\ 2 : 617 



1877 Tanypus Meig. V. d. Wulp. Dipt. Neeii. 299, 5 



1804 Tanypus fasciatus Meig. Klass. 1 : 21, 3 



1804 Tanypus sylvaticus Meig. Klass. 1 : 24, 9 



Antennae brown, including the antennal hairs of the male; 

 ])alpi more or less brown. Thorax brown, with three darker 

 longitudinal stripes, the spaces between the longitudinal stripes 

 and the flattened area in front of the scutellum whitish; ster- 

 num greyish; scutellum yellow; metanotum black. Abdomen 

 brown-black with whitish incisures; venter yellow anteriorly; the 

 anal segment of the male broad and flattened, the claspers short, 

 yellow basally, blackened toward the tip. Legs yellowish brown; 

 the tips of the femora and of the tibiae and the whole of the 

 last four tarsal joints brown; the first joint of the fore tarsus is 



