REPORT ON MOSQUITOES. 



187 



ish, white at the apex of the third joint, the fourth joint usually 

 very small, with a few bristles at the apex. In some specimens 

 this joint is rather large, oblong, with an obtuse apex. The male 

 palpus is black, only slightly dilated, the basal joint has a whitish 

 band in the center and is almost as long as the proboscis; the 

 terminal joint is a little shorter than the central one and both 

 have a narrow pale band at the base. The antena of the female 



Figure 55. 



Culex jamaicensis: 1, female adult; 2, anterior; 3, middle, and 4, posterior claws of 

 male: all enlarged. (Original.) 



is brown, with the basal joint yellowish brown; in the male it is 

 brown with paler plumes. 



The thorax is black, and has generally a striped appearance, as 

 shown in the figure ; absolutely fresh specimens, however, pinned 

 without handling, and before they have had opportunity to denude 

 themselves in the breeding jar do not show the stripes. It is 

 evenly covered with black spiny clothing and has cinerous scales, 

 diffused over the posterior part and collected into two or four 



