142 ENTOMOLOGICAL SOCIETY 



The larvae referred to as cantans previously (Proc. Ent. Soc. 

 Wash., v, 47, 1902) , should be attributed to the following species, 

 C. sylvestris Theob. The larva of C. cantans is yet entirely 

 unknown. 



Culex sylvestris Theob. 



A few examples only were taken with the net, but many were 

 bred from larva?. The larvae occurred in all sorts of temporary 

 pools, swamps and muddy roadside puddles alike. They 

 occurred mixed with other short-tubed larvae, principally Culex 

 canadensis and A'edes fuscus. These three species have essen 

 tially similar habits. A roadside puddle was found filled with 

 them ; when it had nearly dried, I collected the whole, leaving 

 it empty. After the next rain it was again filled with these same 

 three species (though less of the canadensis in proportion). 

 Probably their eggs were lying at that place and some hatched 

 after each rain. A large muddy puddle at Durham contained 

 thousands of u wrigglers," and these were nearly pure sylvestris, 

 as shown by breeding. 



Eggs were obtained from captive females, essentially like 

 those of canadensis and cantans, laid singly and sinking in 

 wa^er. They were obtained late in the season and have not yet 

 hatched. 



Culex territans Walk. 



No- adults were taken with the net. I made a practice of 

 taking all the mosquitoes that came to bite, but never saw a 

 territans. Still the species was common, for the larvae occurred 

 in every suitable pool and, after the middle of July, they were 

 the most abundant Culex larvae to be found. They continued all 

 summer. I am driven to the conclusion that C. territans 

 does not bite. At Bellport, N. Y., where I met with it before 

 (Proc. Ent. Soc. Wash., v, 48, 1902), I could not draw this 

 conclusion, because C. pipiens, closely resembling it, occurred 

 commonly, and it was impossible to catch all the mosquitoes 

 that came to bite on account of their numbers. Still all the 

 territans that I got at Bellport were bred. Eggs were not 

 obtained from captive females. I have a female, still alive, that 

 1 have had for nearly three months, which has refused to lay 

 eggs. It will not bite, but feeds on sugar-water. However, I 

 secured some egg shells from a small pool that was full of 

 territans larvae, and I believe that they are the eggs of this 

 species. They are deposited on the surface of the water in little 

 boats composed of three or four eggs each, adhering by their 

 flat sides, the mass floating sideways on the water. They are so 

 minute as to entirely escape ordinary observation, and are only 

 to be distinguished from the many little black specks floating on 

 the water by examination with a lens. .The larvae pass four 

 stages to the pupa, the life cycle occupying three weeks from 



