257 



fully confirmed our previous idea, based on more 

 general considerations of the importance of 

 species. They were as follows : — 



II. Ennur (Madras) 



Undoubtedly then, under natural conditions, 

 the species is here a very important factor. 



Again, under artificial conditions (feeding 

 experiments), we found that there was a difference 

 in the number of zygotes found in the stomach as 

 the result of feeding. 



The species which appeared to be most active 

 were : — 



M. culicifacies 

 N. siephensi 

 N. theobaldi 

 s 



