MAY PLIES AND MIDGES OF NEW YORK 291 



1830 C h i r o n o in u s vernus Staeger (nee Meig.)- Kroj. Nat. Tids. 



2:580, TO 



1850 Chironomus Zett. Dipt. Scand. 9 : 3579, 108 



1864 Chironomus Scliiner. Fauna Austr. 2 : 597 



Antennae and palpi brown; antennal hairs of the male pale 

 brown. Thorax dark green, with three broad, black, longitudinal 

 stripes ; the sternum and the metanotuni shining black. Abdomen 

 dark olive green : the anal segments of the male rounded, shorter 

 and a little broader than the preceding; the claspers as long as 

 the anal segment, broad in the middle, at the base and at the 

 extremity somewhat narrowed ; the abdomen of the female is much 

 darker, almost black. Legs variable, blackish brown to yellowish 

 brown ; the forelegs long and slender, the fore metatarsus almost 

 twice as long as the tibia (ratio about 4:7) ; the second tarsal 

 joint about one half as long as the metatarsus; the following 

 joints gradually decreasing in length; hairs of the legs dense and 

 light brown in color. Halteres whitish. Wings hyaline, appear- 

 ing, grayish owing to its hairs; crossvein a little proximad of the 

 mid length of the wing; the fork of the cubitus directly below the 

 crossvein. Male, length 3 to 3.5 mm ; female, 2.5 mm. Transla- 

 tion from V. d. Wnlp, loc. cit. Greenland. Lundbeck. 



8. Tanytarsus pusio Meigen 



1830 Cliirononius Meigen. Syst. Beschr. 6 : 256, 117 



1850 Chironomus Zett Dipt. Scand. 9 : 3583, 115 



1864 C h i r o n o ru u s ? Scliiner. Fauna Austr. 2 : 597 



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



1877 Tanytarsus V. d. Wulp. Dipt. Neerl. p.287, 8 



Male. Greenish; thorax with three dark stripes. Head green- 

 ish, palpi subfuscous, proboscis yellowish; large basal joint of 

 antenna fuscous, the next few joints yellow, the remaining ones 

 dark; hairs subfuscous. Thorax green with three dorsal stripes, 

 the sternum and the metanotuni blackish. Abdomen green, 

 darker toward the caudal end; hairs pale; genitalia prominent, 

 yellowish. Legs greenish yellow, the tarsi and the fore femora 

 and tibiae slightly infuscated, middle and hind legs hairy. Fore 

 metatarsus nearly twice as long as its tibia. Wings hyaline, 

 hairy, veins pale, crossvein proximad of the mid length of the 

 wing; fork of cubitus distad of crossvein. Halteres greenish 

 yellow. Length 2 to 3 mm. 



Female. The thoracic stripes reddish or brownish, and the 

 abdomen paler green, otherwise like the male. 



Near the anterior margin of each segment of the abdomen in 

 some specimens there is a faint indication of a darker fascia. 

 Male and female specimens; Ithaca N. Y. Brookings, S. D, 



