MAY FLIES AND MIDGES OF NEW YORK 159 



1818 T a n y p u s Meig. Syst. Beschr. 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 any pus V. d. Wulp. Dipt Neerl. 299,4 



1826 Tanypus fasciatus Macq. Rec. Soc. Sc. Agri. Lille. 187, 5 



1838 Tanypus tenuis Meig. Syst. Beschr. 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 smoky, especially near the anterior margin; crossveins dark 

 clouded, B! with R 2 near its tip, the petiole of the cubitus about 

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



Female. Antennae except apical joint yellowish; the humeri 

 paler and the legs less hairy than in the male. Length 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 sipecimens. 



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 Austr. 2 : 617 



1877 Tanypus Meig. V. d. Wulp. Dipt. Neerl. 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; 

 palpi 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 



