244 AGRICULTURAL EXPERIMENT STATION. 



Description of the Adult. 



This is a medium-sized mosquito, measuring 5-6 mm. ,=.20 

 -.24 of an inch in length, including the beak, which is just about 

 half the length of the body. The head is brown, with the occiput 

 covered with pale yellow scales which extend forward between 

 the eyes ; the palpi in the female dark brown, four jointed, ter- 

 minal joint small, oval in form, pointed at the apex and slightly 

 spiny ; the proboscis pale brown with dark brown scales scattered 



Culex siphonalis: i, anterior, 

 of female: enlarged. (Original.) 



Figure 73. 



median, 3, posterior claws of male; 4, anterior claws 



over the surface, entirely covering 

 p^lpi are similar to canadensis in 

 band in the center of the basal joint 

 the fan-like tufts dense, silky brow 

 brown in both sexes, the basal and 

 female testaceous. 



The thorax is covered with m 

 ^scales at the sides and with a medi 



the apical fourth. The male 

 shape, brownish, with a pale 



and at the two terminal ones ; 

 n in color. The antennae are 

 1 two succeeding joints in the 



ixed pale yellow and brown 

 an stripe composed wholly of 



