170 Mosquitoes 



springs, rain puddles, and everywhere that pipiens 

 does except in filthy water, and, like it, hiber- 

 nates. It seems to be confined to the eastern half 

 of the United States. The adults were found in 

 Baton Rouge from early April to December 19. 

 Like pipiens, they bit twelve hours after emergence, 

 sometimes feeding twice and living several days 

 after they had emptied the ovaries. They generally 

 lay one raft, but sometimes two, in from four to ten 

 days after the first meal. The eggs hatch in from 

 one to three days, and will not resist over six hours' 

 drying. The larvae are found from February 22 to Oc- 

 tober 23, and at the same time as pipiens at the north. 

 They are readily distinguished from those of the 

 latter species by having the antennal tuft decidedly 

 below the middle of the antenna, while in pipiens it 

 is at the outer two-thirds. Both species, as larvae, feed 

 almost constantly, sailing about with the tube at the 

 surface, the body slanting downward and the head 

 sharply depressed. 



Melanoconion atratus. — Although this is not 

 strictly a domesticated species, yet we used to find 

 the rafts in the brick drains around the campus of 

 the Louisiana State University. The adults (Fig. 5, 

 a, page 23) were taken from June 20 to September 

 4. They did not bite but sometimes were filled with 

 some clear fluid. But if they did not make a meal 

 it was not from lack of coaxing, for Dr. Dupree 

 offered a wonderful jack-knife to any one who could 

 induce them to feed on blood, and several of the 

 students, as well as the Doctor and myself, spent 

 much time upon them. He even went to the length 



