THE 3IALARIAL MOSQUITOES 117 



or more, all females, mostly punctipe?i?iis and a few 

 maculipermis. They were iu complete hibernation, and 

 had to be knocked from the wall as if dead, but revived in 

 a glass tube under the warmth of the hand. So far as Dr. 

 Berkeley's observations go, the hypothesis of the Italian 

 workers that only fertilized females survive the winter, is 

 true. 



Dr. Theobald Smith, of the Bussy Institute, has pub- 

 lished a paper entitled, " Notes on the Occurrence of 

 A7iopheles pundipennis and A. quadrimaculatus in the Bos- 

 ton Suburbs," in the Journal of the Boston Society of Medi- 

 cal Sciences (vol. v., pp. 321-324, January, 1901) in which 

 he shows that he has found both species at Jamaica 

 Plain, although malaria does not exist there. The oc- 

 currence of the Anopheles, unless their breediug--places 

 are wiped out, shows that if malaria patients should come 

 to Jamaica Plain, the disease would rapidly spread. 



The species Anojiheles argyritarsis, mentioned in Chap- 

 ter X. and illustrated in Fig-. 29, is a very beautiful species 

 which occurs in Cuba, where it has been captured by Dr. 

 James Carroll of the Army Yellow-fever Commission, 



Food of Anopheles Larvae. 



As already indicated, the principal food of the larvae of 

 Anopheles seem to be the spores of algae, but, as Ave have 

 pointed out, they will swallow anything which floats on 

 the surface of the water. I have seen one nearly choke to 

 death in the attempt to swallow a good sized bit. The 

 English observer, Dr. Daniels, in the course of his in- 



