REPORT ON A'lOSQUITOES. 



287 



on the dorsum, the central not reaching the posterior margin of 

 the mesonotum ; the pleura dark brown with patches of grayish 

 white scales. The legs are black with the under sides of femora 

 pale yellow- The claws of the male in the anterior and mid tar- 

 sal joints (figs. 89, 2 and 3) are unequal in size, the larger with 

 a median and basal tooth, the smaller with a sinsfle tooth near the 



Figure 89. 



Culex trivittatus : i, adult female; 2, anterior, 3, middle, and 4, posterior claws of 

 male: all enlarged. (Original.) 



base. The claws of the posterior tarsal joint (fig. 89, 4) are 

 equal, each with single median tooth slightly nearer the base. In 

 the female the claws are alike on all feet, equal and with one tooth 

 in the centre of each, like the posterior ones of the male. 



The dorsum of the abdomen is black, the venter whitish, the 

 white extending up the sides at the base of the segments and upon 



