24 ENTOMOLOGICAL NEWS. [Jan., ’08 
it certain that there is only one annual brood and that hiberna- 
tion is in the larval stage. 
Mr. Grossbeck has prepared the following description of the 
larva ready for hibernation and apparently in the last stage, 
though probably not quite full grown. The illustrations will 
supplement the description. 
Description of the larva (PI. IV, Fig. bs 
Length, 6 to 7.5 mm. = .24 to .30 of an inch from head to end of ninth 
abdominal segment. It is a robust wriggler resembling in life the 
larva of Culex jamaicensis. In color it is white tinged with a clear 
transparent green which is often the predominating hue. The head is 
pale brown, much broader than long, rounded in front and flat at the 
sides; four large and four small tufts of hair arise from the vertex, 
two of the large ones of 6 or 7 hairs each from the central portion, 
between which the four small tufts are situated, and one of Io or II 
hairs near the base of each antenna. Of the small tufts the anterior pair 
are each composed of 6 hairs, the posterior pair of 7 each. There is 
also another pair of moderate sized hair tufts near the base of the 
head just below and inward of the eyes; these are composed of five 
hairs each. The eyes are remarkably small, black, and placed far 
down on the sides of the head. The antenna (Figs. 3 and 4) is very 
long and somewhat filamentous, infuscated at basal third and almost 
colorless beyond; a large tuft of 18 to 20 long hairs arises from an 
offset at the basal third and from this point the shaft is continued 
for some little distance apparently as a thickened side of a hollow 
tube which is open on one side to the apex of the main shaft; this 
apex is terminated by two long needle-like spines and the filamentous 
process has at its end a very small articulated spine. The mentum 
(Fig. 5) is triangular in form with a deeply excavated base and six 
large teeth on each side of an apical one besides a small tooth which 
is sometimes present near the base. The mandible (Fig. 6) presents 
much the appearance of that of the ordinary Culex (sens. lat.) type 
but has three curved dorsal spines and the teeth are small and situated 
some distance back from the apex. The maxillary palpus (Fig. 7) 
offers little that is peculiar, but the subapical spine is exceptionally 
long and blade-like and the basal process is rather small with curved 
apical teeth. 
The thorax and abdomen are normal in form, the former with the 
usual number and location of long hair tufts; but the abdomen has 
only one tuft of two hairs on each side of the first segment, the fol- 
lowing five each having but a single long lateral hair, while segments 
7 and 8 have none except the several short hairs which are common to 
all segments. The eighth segment bears the lateral patches of scales, 
