MOSQUITOES IN GENERAL 



33 



Structural Characters of Systematic Value. — The Culi- 

 cida3 are subdivided into two subfamilies on the basis 

 of relative length of palpi and proboscis, viz. Culi- 

 cince (Fig. n, a), in which the palpi of the female are 

 shorter than half 

 the length of 

 the proboscis, 

 and in Anophe- 

 lince (Fig. n, c) 

 the palpi of the 

 female are nearly 

 or quite as long 

 as the proboscis. 

 The males (Fig. 

 ii, b) in both 

 subfamilies are 

 provided with 

 somewhat hairy 

 palpi as long as 

 or longer than 

 the proboscis. 

 The determina- 

 tion of the gen- Fig. o. A midge (Chironomus), often mistaken for a mos- 

 quito. (After Osborn.) 



era and species 



rests quite largely on the character of the scales and 

 the tarsal claws (ungues) (Fig. 12). The scales 

 on the wings and body are of several varieties, as 

 shown in Fig. 13. The occurrence and arrangement 

 of these scales upon the head, thorax, abdomen, and 



