MAY FLIES AND MIDGES OF NEW YORK 287 



very short-haired, fore metatarsus about one sixth longer than 

 its tibia. Wings cream white, with white veins; venation as fig- 

 ured. Ha Iter es white. 



Female. Like the male but with yellow antennae, and the 

 abdomen is nearly uniform in color, paler margins at most but 

 feebly indicated. Length, both sexes, 3.5 to 4.5 mm. 



In one male specimen the abdomen is wholly black, and the 

 basal joint of the antenna brown. This fly greatly resembles the 

 female of C h i r o n o m u s nigricans n. sp., from which it 

 may readily be distinguished by its hairy wings. Numerous speci- 

 mens; Ithaca N. Y., May, June, July. Washington. State. 



2. Tanytarsus nigripilus n. sp. 



Eesembles T . s y 1 v a t i c u s V. d. W., an European species, 

 but differs in having black halteres. 



Male. Black, subshining; length 3.5 to 4 mm. Head black; 

 palpi, proboscis and antennae also black, the last with blackish 

 hairs. Thorax wholly subshining black, the dorsum when viewed 

 obliquely from in front with two more distinctly shining black 

 stripes. Abdomen black, subshining, incisures faintly cinereous, 

 hairs black. Claspers slender, brownish. Coxae and legs black, 

 long-haired, particularly the fore tarsi, which are almost bearded; 

 fore metatarsus about one sixth longer than its tibia. Wings 

 hyaline, slightly brownish tinted, anterior veins brownish, pos- 

 terior-ones pale; cubitus forks about under the crossvein. Hal- 

 teres fuscous or black. 



Female. Like the male, but the fore tarsi are less hairy and 

 'the halteres are paler. Ithaca N. Y., April. Washington State. 



3. Tanytarsus gmundensis Egger 



1863 Chironomus Egg. Verb. z. b. Ges. Wien. 13 : 1109 



1864 Cbironomus Scbiner. Fauna Austr. 2 : 597, 7 

 1874 Tanytarsus V. d. Wulp. Tijd. v. Ent 17 : 134 

 1877 Tanytarsus V. d. Wulp. Dipt. Neerl. p.285 



(P1..30, fig.15) 



. Male. Fuscous. Head, including palpi, proboscis and anten- 

 nae fuscous, the last with fuscous hairs. Thorax and abdomen 

 wholh^ fuscous, the last with yellowish hairs; genitalia brown. 

 Legs fuscous, trochanters and bases of femora yellow; short- 

 haired. Fore metatarsus about 1.5 times as long as its tibia. 

 Wings h}' aline, veins near the anterior margin yellowish, and 

 others paler. LTalteres yellow. 



Female. Like the male but with broader wings. Length 3 to 

 4 mm. 1 cannot distinguish the American from my European 

 specimens. Ithaca N, Y., Chicago 111., Washington State. April 

 and October. 



