AQUATIC INSECTS IN NEW YORK STATE At 
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 middie 
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 
3) or 40 teeth each. The ninth segment has a tuft of about 16 
dorsocaudal bristles, one of them longer than the rest, and 
ou 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 saddie. 
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 25 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. Culicidae. 1:406 
This species will fall in the same couplet with C. stimu- 
lans Walker —C. cantans 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. vexans Meigen and with Walker’s descrip- 
tion of C. stimulans. From the first it differs in having 
{in wnrubbed, bred specimens) an unmarked thorax, and in having 
only the immediate bases of the tarsal joints white. The male 
also hag the long claw of the middle foot slightly curved but not 
sinuous [compare pl.45, fig.10 and pl.40, fig.11]. From C. stim- 
ulans it differs in having the posterior fork cell wider and 
shorter than the anterior, while instimulans, according to 
Giles, they are “of about equal length and breadth.” From both 
