REPORT ON MOSQUITOES. 183 



as egg" hibernates make so late a start in the spring as this species 

 seems to do. 



ihe egg-laying habits have been observed by Dr. J. W. Du- 

 pree, of Baton Rouge, La., and recorded by Prof. H. A. Morgan. 

 A female specimen captured April 30th, was permitted by Dr. 

 Dupree to teed upon his hand until fully engorged. On the morn- 

 ing of May I, forty eggs were found, some at the bottom of the 

 g^lass containing the water, while others were resting upon some 

 fibers of cotton which had accidentally fallen into the vessel. 

 Dr. Dupree thinks it altogether likely that the eggs, wliich are 

 deposited singly, under normal conditions rest upon floating 

 debris. 



Description of the Larva. 



The larva and details are illustrated on figure 54. The full . 

 grown wriggler measures 7 to 8 mm.,=.28 to .32 of an inch in 

 length exclusive of the anal siphon, and the body is slate gray to 

 blackish in color. Young and half grown specimens are whitish 

 to pale gray. The head is large, slightly smaller than the thorax, 

 widest at the eyes, a little excavated immediately before the 

 antennae and rounded in front; it is pale yellow and usually 

 immaculate, though at times there are faint clouds, or a distinct 

 brown spot in the center of the vertex. Four hair tufts of two 

 hairs each, in pairs widely apart, arise from the central part of 

 the vertex and a larger one of five or six hairs is at the base of 

 each antenna. The antenna (fig. 2) is very long and slender, 

 sharply curved a little below the middle and tapered evenly to- 

 ward the apex ; in color it is whitish at the base, becoming brown 

 apically; the surface is thickly set with broad spines of which 

 the bases are prolonged, giving the antenna a scaled appearance ; 

 the tuft is situated on the curve at the middle and consists of six 

 or eight hairs ; the apex has three long spines, one very short one 

 and a small joint. The rotary mouth brushes (fig. 6) are large, 

 wholly composed of simple hair. The mentum (fig. 4) is broadly 

 triangular with a large apical tooth and thirteen to fifteen small 

 ones on each side. The maxillary palpus (fig. 3) is normal with 

 a short, stout basal joint and the mandible ( fig. 5) is peculiar by 

 a deep indentation on the dorsal surface, the reduction in size of 

 one of the curved dorsal spines and by having a row of papillas 

 instead of spines between the large dorsal spines and the teeth. 



The thorax is broader than long with the lateral hair tufts 

 short and wholly destitute of tufts on the anterior margin. 



The first three abdominal segments are transversely oblong, 

 the remainder subquadrate, each with two hairs to the lateral 



