DEVELOPMENT OF COPIDOSOMA GELECHLE. 



353 



done by removing the carcass from the gall chamber a short 

 time before the emergence of the parasites, and enclosing it in a 

 small vial. After all of the parasites have emerged they are 

 killed by filling the vial with 80 per cent, alcohol, and then 

 counted under a binocular microscope. This procedure has the 

 advantage of eliminating the possibility of contamination from 

 other polyembryonic broods. Furthermore, the use of the bi- 

 nocular in counting enables one to distinguish readily the two 

 sexes. The strong sexual dimorphism in Copidosoma makes this 

 task rather easy. The females have the enlarged club-shaped, 



TABLE IV. 



TABLE SHOWING THE NUMBER OF PARASITES IN MALE BROODS. 



Total = 19,874. 

 Average = 175.32. 



terminal segment of the antenna, and bright yellow legs, while 

 the males do not have the enlarged segment and the legs are of a 



