MAY FLIES AND MIDGES OF NEW YORK 203 



(cell R 4 -te) ; a streak near the middle, and a spot near the tip of 

 the cell in front of the forked cell ; a spot on the posterior branch 

 of the furcation, and one or two in the anal angle. Length 1.75 

 to 2.25 mm. St Vincent Island. 



7. Chironomus fascipennis Zetterstedt 



1838 Chironomus Zett. Ins. Lappon. 813, 21 



1850 Chironomus Zett Dipt Scand. 9 : 3505 

 1864 Chironomus Schiner. Fauna Austv. 2 : 599 



Male. Wholly pale yellow, not shining; the antennae testace- 

 ous, somewhat infuscated, the first joint yellow, the hairs sordidly 

 yellow. The eyes black. The palpi fuscous. The thorax with 

 three yellow stripes; the wings hyaline, with two moderately 

 wide fuscous cross bands, one at the middle of the wing, rather 

 faint, the other a little more distinct at the tip ; besides this there 

 is a fuscous spot at the base. Halteres white. The legs pale, 

 somewhat pilose, middle and hind tibae with black tips. Anterior 

 tarsi bare. Length 3.5 mm. New Jersey (Johnson) . 



8. Chironomus taeniapennis Coquillett 



1901 Chironomus Coquillett Proc. U. S. Nat Mus. 23:607 



1902 Chironomus ?pulchripennis Coquillett. Proc. U. S. Nat. 



Mus. 25:94 



Female. Yellow, tinged in places with green, especially on the 

 abdomen, mouth parts, apical half of the femora, bases of front 

 and middle tibiae and nearly the whole of the hind ones brown, 

 metanotum marked with a transverse pair of triangular brown 

 spots; wings whitish, the costal cell from the humeral crossvein 

 to apex of auxiliary vein (Sc), a cross band extending from the 

 latter point to hind margin of wing where it is greatly dilated, 

 finally the apical fourth of wing, black. Length 4 mm. Massa- 

 chusetts, New Jersey. Coquillett, loc. cit. Illinois, New York. 

 South Dakota, Pennsylvania. 



Upon a comparison of the above description with that of 

 pulchripennis it will be seen that they greatly resemble 

 each other. The examination of a series of Ithaca specimens 

 shows considerable variation in the extent of the dark coloring. 

 To the description I may add that the male does not differ from 

 the female except that the flagella of the antennae are brownish ; 

 the genitalia yellow, the lateral arms long, the keel slender, 

 curved, and not much enlarged. In the living specimen the gen- 

 eral color is quite green, but upon drying some specimens become 

 almost yellow. The abdominal markings are variable; in some 



