424 NEW rORK STATE MUSEUM 



nae are six tufts of hairs, the median pair short; caudad of these 

 is one pair of long setae, and directly caudad of each eye is a 

 single one. The antennae [flg-l] have three or four apical bris- 

 tles besides the usual small terminal joint, and a little distad of 

 the middle is a single long seta. Labrum, rotatory fan and max- 

 illae normal, the two dorsal spines of the latter rather longer 

 than in O. p i p i e n s and the papillae on the mesal surface 

 are more prominent. The spines of the epipharynx as in C. 

 p i p i e n s , but the lateral ones shorter than the median pair. 

 The stout apical spine of the mandible [fig.2] does not project 

 beyond the tip of fthe teeth. The labium [flg.4], is triangular 

 with 19 teeth, hair on its ventral surface, and caudad of the 

 transverse suture are two pairs of setae. The hypopharynx, 

 shown somewhat dia grammatically in figure 6, has a number 

 of sharp teeth besides two lateral lobes with fingerlike processes 

 (not shown in the figure). On the dorsal surface, along the ce- 

 phalic margin of the thorax, are six or eight hair tufts, all rather 

 short except the lateral ones, which are of moderate length; 

 on the middle and on the posterior end of the lateral margin 

 are two long tufts. Xear the caudal margin are two stellate 

 hairs. Each abdominal segment has, besides the long lateral 

 tuft, four short dorsal tufts and a few short lateral and ventral 

 hairs. The lateral comb of the eighth segment is composed of 

 about eight spines arranged in one irregular row; the ninth 

 segment but little longer than wide, is provided with a dorso- 

 caudal tuft of 10 or 12 hairs, a ventral row of about 10 tufts, 

 each tuft with four or five hairs. The blood or tracheal gills 

 are comparatively short. The breathing tube is short, about 

 twice as long as wide, with a lateral longitudinal row of 18 to 

 20 spines, at the caudal end of which is a single hair tuft. 



Pupa. The pupa does not appear to differ from C. cantans. 

 The air trumpet is widened at the top, the plane of the margin 

 of the aperture makes abou/t 45° with the longitudinal axis. 

 Bred specimens. July 1901. Ithaca N. Y. 



Genus abdes Meigen 



Small, brownish or blackish gray species closely resembling 



Culex, differing only in that both sexes have very short palpi. 



According to Van der ^Yulp, the palpi, though short as in the 



female of Culex, are not cylindric as in the latter genus, but 



conical or pointed, and consist of two joints only. But two 



species of adults are known from the United States. 



A. f u s c u s O. S., Western Diptera. 1877. p.l91. Cambridge Mass. 

 A. s m 1 1 h i i Coquillett, Canadian Ent. 1901. p.260. New Jersey. 



