54 The Control of Mosquitoes 



(A) The white hind-footed group, comprising: A. 



argyritarsis, A. albimanus, A. tarsimaculata. 



(B) The leg-uniformly-colored group, comprising: 



A. pseudopunctipennis, A. franciscanus. 



(C) The spotted-leg group, comprising: A. male- 

 factor, A. apicmacula. 



These groups present well-marked differences in the 

 markings of adults, in the breeding habits and ana- 

 tomical characters of the larvae, and, as will be shown, 

 they possess varying susceptibilities to malaria. 



