LIFE-HISTORY OF BLOW-Fl.V 



203 



deposited. He found the flies would emerge tiom pupae buried 

 under 60 cm. of sand. 



With an average mean temperature of 23° C. (73'5° F.) and 

 using fresh rabbits as food for the hirvae, the following were the 

 shortest times in which I reared C. erythrocephala. The eggs 

 hatched from ton to twenty hours after deposition. The larvae 



9W 



B 



D 



Fig. 91. Posterior end of mature larva of C. erythrocephala. 

 A Posterior spiracles of first larval stage of C. erythrocephala, Mg. 

 B Posterior spiracles of second larval stage of C. erythrocephala. 

 C Posterior spiracle of mature larva of C. erythrocephala. 

 D Anterior spiracular process of mature larva of C. erythrocephala. 



underwent the first ecdysis eighteen to twenty-four hours after 

 hatching; the second moult took place twenty-four hours later, 

 and the third larval stage lasted six days, the whole larval life 

 being passed in seven and a half to eight days. Fourteen days 

 were spent in the pupal state; thus the development was complete 

 in twenty-two to twenty-three days. I have no doubt that this 

 time could be shortened by the presence of a very plentiful supply 

 of food, as an enormous amount, comparatively, is consumed. 



