356 



NEW YORK STATE MUSEUM 



comblike structures appear to form a dark colored lateral patch 

 near the posterior third of the segment, the bases of the spines 

 being fused together. 



Corethra cinctipes Coq. 



PI. 28, fig. 1 



This species was described last year by Mr Coquillertt, who had 

 received specimens several years before from Franconia N. H,, and 

 also from Mt Vernon Va. It was bred by us from larvae taken in 

 a woodland pool at Karner May 10, 1904, adults appearing May 

 15. This species according to Mr Coquillett may be readily recog- 

 nized by its banded legs and mottled wings. 



Description. The original description of the adult is as 



follows : 



Blackish brown, the apices of the antennal joints except the last 

 joint, the halteres, bases of the segments of abdomen in the male, 



base and under side of femora, a broad 

 band near four fifths of their length, 

 their extreme apices, bases of tibiae 

 and a band near one fourth of their 

 length, also bases of the first three or 

 four joints of the tarsi, yellow; hairs of 

 male antennae brown, their bases- yel- 

 low, those at tips of antennae almost 

 wholly yellow; thorax grayish pruinose, 

 marked with four black vittae; wings 

 grayish hyaline, hairs of veins black 

 and with yellow ones as follows: on the 

 bases and apexes of the veins, on the 

 first vein where the second issues from 

 t, on the second vein where the third 

 issues from it and at the point where it 

 forks, on the fourth vein at the inser- 

 tion of the cross vein and also where 

 this vein forks, and on the fifth vein 

 where it forks; first submarginal cell 

 nearly twice as long as its petiole, cross 

 vein at apex of second basal cell less than its length before the 

 one above it; tarsal claws of male each bearing two long, 

 slender teeth on. the under side, one near the base and the other 

 near the middle, those of the female with a single tooth near the 

 base of each; length, 3 to 4.5 mm. 



Larva. About i/4 inch long. Head light brown, eyes dark 

 brown. Tip of labrum thickly ftinged with serrate scales and 



Fig'. 97 Labrum of larva of 

 C. cinctipes 



