Notes on the Commoner Species 151 



be kept seventy-six days in his laboratory and would 

 infect fifty-seven days after biting. Not all which 

 bite a fever patient at the same time are infected 

 and allow the parasite to develop, the same being 

 true with Anopliclcs. There is reason to believe, 

 says Dr. Agramonte, that an infected mosquito can 

 transmit the virus all the rest of its life ; if this is so, 

 one mosquito might be responsible for at least six 

 cases of fever. He also makes an interesting state- 

 ment to the effect that, especially in Cuba, ants will 

 attack the adults, 

 hanging viciously 

 to their legs. 



I have taken the 

 liberty of copying 

 Dr. Agramonte's 

 fine description of 

 Stcgomyias meth- 



Slegomyia 



Fig. 31. — Labial p!at3 

 1 ~ r ' • •.• calopus larva (greatly enlarged). 



od of oviposition: * v& J & ; 



"The mosquito alighted upon the water, which was in 

 a small beaker inside the jar, with legs spread wide 

 apart. The abdominal segments being bent forward 

 and downward, she dipped her whole body until the last 

 segment touched the surface of the water ; then she 

 rose, walked a few steps and dipped again. This she 

 would do repeatedly (fourteen to twenty-two times), 

 when she would remain for a slightly longer time, with 

 the last abdominal segment touching the water, and 

 would allow a minute white egg to issue forth upon the 

 surface. In this way she laid at the rate of three eggs 

 per minute, resting quietly after every sixth or eighth 

 egg for about thirty seconds, when she would resume 

 the process." 



