Mosquitoes and Malarial Fever 



491 



the surface of the water along the banks where they are protected 

 by the vegetation. They are voracious feeders and satisfy their 

 appetites with all kinds of minute vegetable and animal organisms 

 or remnants. In a day or two the larvae molt for the first time. In 



Fig. 193. — Pupa of Anophdes maculipennis (Brumpt). 



; /■' . Brushes 



/■'... Maxillary palyp 



/ ... Antenna 



Eye 



" Head 



— Thora 



;> Silky bristles 



Abdomen 



Chitinous combs 



'' stigmata 

 ,,- Anal papilla 

 Large bristles 



Fig. 194. — ^Larva of Anopheles maculipennis (Brumpt). 



five or six days, having grown larger, they molt a second time and 

 pupate. The appearances of the larvae and pupae are shown in the 

 accompanying diagrams. The pupa floats at the surface of the 

 water, is comparatively inactive and does not feed. If disturbed, it 



