148 Mosquitoes 



stage aids in breathing. Full-grown larvae never 

 remained under water so long. 



5. calopus adults were found out-of-doors in Baton 

 Rouge from March 25 to November, and in the house 

 in November. Larvae were found out-of-doors Nov- 

 ember 15. Larvae taken November 3 were imagos 

 November 9; temperature, 56 F. ; 50 numbed them, 

 and they refuse to bite at that temperature, but 

 can stand it as low as 34°. Larvae will live in water 

 of 50 , and pupate at 53 . Two individuals which 

 imaginated November 3, lived to January 9. On that 

 night the cold stiffened them, but one revived and 

 fed. C. rcstuans in the same cage were not affected by 

 the cold. 6". calopus will mate and at times lay with- 

 out feeding, but they generally bite two or three times 

 before depositing the first batch, which is laid from 

 six to fifteen days after the first meal. They average 

 two or three batches, but will lay nine. There are 

 from twenty-seven to ninety-seven eggs in a batch, 

 extruded singly. They hatch in from six days to nine 

 months after laying. The larval life is from eight to 

 thirteen days in fairly warm weather, the pupal one to 

 five. The adult can survive for six days with neither 

 food nor water ; females have lived sixty-one days on 

 dates and water, males sixty-eight days. They gen- 

 erally bite three days after emergence, but may feed 

 in twenty-four hours. They often mate five minutes 

 after oviposition. 



The following is a typical record. This female made 

 a meal July 30 and mated the same day. She subse- 

 quently fed after each oviposition, immediately after 

 leaving the water, except on August 16. She did 



