17^2 



The Ungues. — The ungues vary in the male 

 and female and in the different legs. They may 

 be simple, uniserrated or biserrated (rarely tri- 

 serrated). (Fig. 45.) They are of specific value 

 (Theobald). 



The Abdomen 



The abdomen consists of nine segments. To 

 the ninth segment are attached the genitalia. 



The genitalia are variously shaped lobed 

 appendages. In the male they are provided at 

 their free end with claspers. The claspers in the 

 male are of specific value (Fig. 46). 



Fig. 46. Male Genitalia 



Technique ; — 



1. The constituent parts of the proboscis maybe readily 

 separated by dropping the living mosquito into alcohol 

 (Christy). 



2. The study of the chitinous parts is much facilitated 

 by soaking in oil of cloves. 



