AQUATIC INSECTS IX NEW YORK STATE 421 



is somewhat more rounded, the middle tooth prominent. The 

 thorax is transversely oval, with three or four rather short, 

 stout setae on the cephalolateral margins, caudad of which and 

 near the lateral margin is a tuft of short hairs; on the middle 

 •of the lateral margins are two tufts of feathered hairs, and 

 caudad of this is another pair. The abdominal segments are 

 slightly constricted at the incisures; the first segment has three 

 or four long feathered hairs on each side; the rest of the seg- 

 ments each have about two on each side, besides some short, 

 scattered ones. The lateral combs of the eighth segment have 

 o-j or 40 teeth each. The ninth segment has a tuft of about 16 

 dorsocaudal bristles, one of them longer than the rest, and 

 <m its ventral surface are about 16 tufts, the first four some- 

 what separated from the rest and from each other. The dorsal 

 surface of the segment is covered by a brown chitinized saddle. 

 The tracheal or blood gills are of moderate length. The breath- 

 ing tube is long, about four or five times as long as wide; with 

 20 or 2.J lateral serrate spines in the longitudinal row, the basal 

 four or five being smaller than the rest. 



Pupa. The pupa greatly resembles those of the other species. 

 The breathing trumpet widens at about one third the distance 

 from the base, its open end only slightly oblique. 



Described from a number of bred specimens. May 1901. 

 Ithaca N. Y. 



Culex sylvestris Theobald 

 Monogr. Onlicidae. 1:406 



This species will fall in the same couplet with C. s t i m u - 

 1 a n s Walker (^C. c a n t a n s Meigen), in the key given in Dr 

 Howard's book on mosquitos (1901 ed.). It is apparently 

 not uncommon and has probably heretofore been confused 

 with the above mentioned species. It greatly resembles 

 €. cantans, it also agrees fairly well with the descrip- 

 tions of C. V e X a n s Meigen and with Walker's descrip- 

 tion of 0. s t i m u 1 a n s . From the first it differs in having 

 <in unrubhed, bred specimens) an unmarked thorax, and in having 

 ■only the immediate bases of the tarsal joints white. The male 

 also has the long claw of the middle foot slightly curved but not 

 sinuous [compare pl.45, fig.lO and pl.40, fig.ll]. From C. s t i m - 

 u 1 a n s it differs in having the posterior fork cell wider and 

 shorter than the anterior, while in s t i m u 1 a n s , according to 

 Oiles, they are "of about equal length and breadth." From both 



