Dec, I902.] Dyar : Larv.i-: of North American Culicid.«, 195 



tufts preceding this barred area. Lateral comb a patch of spines, low 

 triangular in shape, about three rows deep in the center. 



Stage III. — Head slightly paler, the base of the antennae paler 

 than the tip, the tuft arising a little before the middle. Otherwise as 

 before, but the ventral brush stronger, and the comb of the eighth 

 segment contains more numerous spines. 



Stage IV. — (PI. XVI, Fig. i.) Head pale brown, the antennae 

 darker on the outer third, but brownish throughout ; tuft arising a lit- 

 tle before the middle, slight, not long enough to reach to the tip of the 

 joint. Thoracic hairs finely, weakly barbuled, arising from large in- 

 fuscated tubercles. Abdominal hairs simple, moderate, double as far 

 back as the seventh segment. Anal segment with a broad dorsal 

 plate which reaches nearly to the ventral line but does not enclose the 

 segment. Dorsal tuft and ventral brush normal, the latter with small 

 tufts before the barred area. Tube conic, tapered, about two and a 

 half times as long as wide, with two rows of pecten at the base (Fig. 

 I, A), followed by a little tuft. Lateral comb of the eighth segment 

 a patch of small spines in triangular form, over three rows deep (Fig. 

 i,B). 



Pupa. — The usual shape and appearance, rather large, the air tubes 

 moderate, funnel-shaped narrowed at base. 



Dr. John B, Smith has given an account of the life-history of this 

 species (Ent. News, XIII, 267, 1902). His conclusions agree in the 

 main with my observations except in regard to the matter of hiberna- 

 tion, which is in the egg stage (Science, N. S., XVI, 672, 1902). 



Culex atropalpus CoquiUett. 



Egg. — Elliptical, the ends abruptly narrowed, making them round 

 pointed, the antemicropylar one more sharply so and a slight narrow- 

 ing of the whole egg toward this end. Deep black, the coarse 

 reticulations filled by clear granules and a clear annular cushion at the 

 micropylar end, the whole covered by a layer of mucilage. Length, 

 .6 mm. ; width .2 mm. Laid separately in groups adherent to the 

 surface on which they are deposited. 



Stage IV. — (PI. XVI, Fig. 2.) Head rounded, dark brown, 

 nearly black ; antennae slender, small, uniform, the tuft at the middle 

 of the joint and reduced to but one inconspicuous hair. Body hairs 

 normal, moderate, thoracic ones slightly barbuled, abdominal ones 

 simple, several-haired. Tube short, not over twice as long as wide, 



