Larvae and Pupae 



73 



of skimming the surface. The breathing tube of 

 Anopheles is well adapted to this habit, being prac- 



FiG. 14. — Mandibles of larvne (ventral view, greatly enlarged): a, 

 Psorophora ciliata; l>. Anopheles maculipennis; c, Uranotania sapphirina; 

 ■J, Uchlerotatus triseriatus. 



tically atrophied. It will readily be seen that a 

 long breathing tube would here be much in the 

 way. The surface feeding will account also for the 



