10 



Journal New York Entomological Society. [Vol. xvi. 



Chironomus poecilopterus, new species. 



Male. — Vertex of head tan color, antennal hairs silvery gray darkening toward 

 the tips of the antennae, joints almost black except the first, which is tan ; mesothorax 

 deep cream (pale green in life), with silvery pruinosity ; median vittatan, its caudal end 

 bearing two small brown dots ; lateral vittaa tan which color extends also over the caudal 

 half of the pleurae, the cephalic parts of which are creamy ; scutellum creamy ; metanotum 

 tan, with two dark brown, almost black stripes approaching posteriorly ; wings (fig. 

 7, c) bare, hyaline, with costal area cinereous, an irregular cinereous band crossing 

 the wing at the small cross vein and cubitus fork, occupying about one half of the 

 length of the lower branch of the radius and extending irregularly basad along the 

 caudal margin to the tip of the anal vein. A small, cinereous, somewhat wedge- 



FlG. 7. Comparison of wing markings (not to exact scale) : a, C. calopterus ; 

 b, C. pulchripennis ; c, C. pcecilopterus ; d, C. zonopterus ; e, C. nephopttrus ; f, C. 

 tceniapennis. 



shaped spot at tip of wing. Abdomen covered with long light-colored hairs, first 

 four segments nile green in life (fades to cream in death), caudal third of fifth seg- 

 ment and the whole of the succeeding segments and claspers mottled light and dark 

 brown. Legs (fig. 3) fringed with long fine hairs corresponding in color to the 

 parts on which they are ; coxae creamy, also the very bases of the femora, rest of femora 

 dark brown, with creamy band occupying about the middle of the distal halves ; prox- 

 imal half of tibia in middle and fore legs dark brown, except the very base which, 

 with the distal half, is creamy, a dark spot at juncture with tarsi, in hind legs the 

 proximal two thirds of the tibia is dark ; tarsi creamy white, claws black. Length 

 4.5 mm. Length of wing 3.5 mm. 



Type. —Male, Cat. No. 11023, U. S. N. M. 



Female. — Head and antennas light tan, thorax as in male, with markings less 

 pronounced and the creamy part having a decided greenish tinge. The median vitta, 



