170 Journal New York Entomological Society. [Voi. xii. 



all the summer and following Avinter and hatched as soon as the ice 

 melted the following spring. The eggs were laid singly. They are 

 peculiar, being very wide and angularly shaped. They float at first, 

 but soon sink or become adherent to objects at the side of the pool or 

 floating on it. 



On rearing the eggs that had hibernated, I was surprised to find 

 that the larvae differed markedly from puuctor and were obviously a 

 distinct species, the imagoes of which I had confounded with, piincfor. 

 I have referred to the egg as that oi punctor (Proc. Ent. Soc. Wash., 

 VI, 39, 1904) ; this reference should be cancelled. The mature form 

 I have in only very slender material. The original female from which 

 the eggs were obtained is badly rubbed and a male bred by Dr. Dim- 

 mock at Springfield, Mass., from an identical larva, is broken. Mr. 

 Coquillett has kindly examined the specimens and does not detect 

 any difference ; but he considers the material too poor to form an 

 opinion on. I am inclined to designate this form provisionally as 

 Ciilex frichuriis, in order that it may be referred to. The name is 

 given in allusion to the unusually hairy air tube of the larva, since it 

 is the only species of the short-tubed group that has more than a single 

 hair tuft. 



Early Stages of Culex trichurus Dyar. 



Egg. (Plate IX, Fig. 2.) — Thickly fusiform, the ends well tapered, one side 

 more bulging than the other. Black, the surface very finely granular shagreened all 

 over, no sculpturing, no mucilage. Laid loosely, floating, but sinking at the first 

 touch or adhering by surface tension to marginal objects. Length 0.6 mm., width 

 0.3 mm. 



Stage I. — Head rounded, flattened, normal ; antennre moderate, equal, with 

 small spinules, terminal digits and tuft of hair at the middle of the joint, all darkly 

 infuscated. Body moderate, equal, submoniliform, normal ; hairs moderate, be- 

 coming gradually less posteriorly. Air tube moderate, about three times as long as 

 wide, the basal two thirds colorless, the tip infuscated (Plate IX, Fig. 3); pecten of 

 two rows of flat, dentate plates with long marginal spine (Plate IX, Fig. 4), the 

 single hair arising well within the pecten and nearly at the middle of the tube. Lat- 

 eral comb of the eighth abdominal segment a row of obscurely digitately spined teeth 

 with central longer spine (Plate IX, Fig. 5) in a single row, parallel, approximate, 

 six, seven or eight in number. Anal segment with a small, rounded quadrate dorsal 

 plate, darkly infuscated ; terminal hairs and four anal processes normal ; no ventral 

 brush. The body is pigmented in brown over the dorsal region. 



Stage II. — Head rounded, flattened, normal, darkly infuscated, the antennae 

 moderate, uniform, with normal terminal spines and hairs, sparsely spinulose, darkly 

 colored throughout ; a small tuft of two hairs at basal third. Body normal, darkly 

 pigmented dorsally ; air tube short, about twice as long as wide, abruptly tapered 



