REPORT ON MOSQUITOES. 189 



is probable that the species occurs under favorable circumstances 

 throughout the State, but both larvee and adults are so strongly 

 marked that if they were at all common anywhere, examples 

 would almost certainly have reached me. The species winters 

 probably, in the egg stage, and does not become noticeable until 

 mid-£!"mmer. 



Description of the Larva. 



The full grown larva is illustrated fig. 56 and measures 8 to 

 9 mm., or about one-third of an inch in length, exclusive of the 

 anal siphon, is very stout in build and of a dirty pale yellow color. 

 Young and half grown larvse are more slender and whiter except 

 for the food matter in the alimentary canal, which is usually 

 dark. The head is rather long, tapering considerably toward 

 the front, uniformly yellow in color and without maculation. 

 In young larvje it is dirty gray. In the center of the anterior 

 part of the vertex are found short hair tufts of four or five hairs 

 each and another of the same size is at the base of each antenna. 

 The antenna (fig. 56, 2) is rather short, gently curved, dilated 

 about one-third from the base, then tapering gradually toward 

 the apex ; in color it is black, the basal third whitish and the sur- 

 face with scattered stout spines; The tuft is short, consists of 

 about a dozen hairs and is situated at the center, slightly nearer 

 the base, directly above the dilation. The apex has three mod- 

 erately long spines, a shorter one and a small joint. The rotary 

 mouth brush (fig. 56, 5) is yellowish brown in color, composed 

 entirely of simple hair. The mandible (fig. 56, 4) is normal in 

 shape, without a row of long spines on the margin between the 

 apex and the two curved, dorsal spines. The maxillary palpus 

 (fig. 56, 3) is short and broad, almost circular in outline, with a 

 moderate apical tuft and a small basal joint. The mentum (fig. 

 56, 6) is almost as high as it is broad at the base, w'ith only 

 slightly curved sides of from twelve to fourteen small teeth on 

 each side of the apex. 



The thorax is almost circular in outline, with a smooth surface 

 save slight depressions on the anterior and posterior parts. The 

 faint lateral angles each give rise to a number of short hair tufts 

 and there are several very small tufts on the anterior margin. 



The abdominal segments are very broad in comparison to the 

 thorax, with four or five hairs to each lateral tuft, in the two 

 anterior segments up to seven. These tufts are short in the ma- 

 ture larva, but in the young larvre they are comparatively much 

 longer and the abdomen is narrower. The eighth segment has 



