62 



mosquito a peculiar and very characteristic awl-like 

 appearance (Fig. 20). 



4. The attitude adopted by Anofhelines is, as a 

 rule, characteristic. When an Anopheline rests upon 

 a wall, its body projects so as to form a distinct angle 

 with it. In some cases the angle assumed is almost a 

 right-angle. In the case of almost all other mosquitoes 

 the body is held either parallel with the wall, or what 

 is more frequent, the tail approaches the wall, giving 

 the insect a ' hunchbacked ' appearance. This ditfer- 



Fig. 20. Shewing distinction between resting attitude of 

 an Ano-pheline (left} and T aeniorhynchus (right) 



once is readily seen by any careful observer, and is a 

 practical and useful distinction. A characteristic of 

 an Ano-pheline is that it rests by preference on the first 

 two pairs of legs only, and keeps the last pair stretched 

 out stiff and straight, or they slowly oscillate to and fro. 

 Many mosquitoes wave the hind legs, notably Stegomyia, 

 but they are held with the tarsi curved upwards. 



