104 



MOSQUITOES 



larvpe commenced to thrive much better, grew rapidly, 

 and the g-eneral color of the body chang-ed to green. The 

 description of the habits given above held well until after 

 the last molt preceding the change to pupfe. In this final 

 larval stage, as shown in Fig. 21, the diameter of the 

 thorax became much greater in comparison with the rest 



Fig. 22. — Head of Larva of Anopheles macnlipennis^ under side ; greatly 

 enlarged. (After Nuttall.) 



of the bod}^ The larva was less marked, more incon- 

 spicuous, and altered its feeding habits to some extent. 

 After remaining at the surface of the water, feeding, as 

 before, uiDon floating particles, for some time, it would 

 wriggle violently and descend to the bottom, where it 

 would remain frequentl}^ as long as ten minutes before 

 reascending to the top. Its appetite was evidently so 



