172 Journal New York Entomological Society. [Voi. xii. 



BRIEF NOTES ON MOSQUITO LARViE. 



By Harrison G. Dyar, A.M., Ph.D., 

 Washington, D. C. 



Partial regeneration of antenn/E in Culex dyari Coq. — Dr. 

 Geo. Dimmock sent some Culex dyari larvae from Springfield, Mass., 

 by mail. They were damaged in transit, many being killed, while 

 some of those that survived had lost the antennae. They were in 

 stage iii and, on molting to the last stage, the antennae were partly 

 regenerated. The antenna in this species is very long and conspicuous. 

 slightly swollen, white with black base and tip, the outer fourth con- 

 tracted, bearing a tuft at the contraction, two hairs toward tip and a 

 long and short spine at apex. The regenerated member consisted of 

 an elliptical bladder-shaped organ only about twice as long as wide, 

 spinose, but without any hair tuft or terminal hairs. 



Oviposition of Culex atropalpus Coq. — I have noted the egg 

 laying of the autumnal specimens of this species (Ent. News, XIV, 

 i8o, 1903). In order to test whether there is more than a single 

 brood annually, I secured early larvae from the pot holes at the Stubble- 

 fiield Falls of the Potomac. I found the larv^ well grown on May 10. 

 Imagoes began to issue toward the end of May and laid eggs freely 

 within two weeks of emergence. The eggs hatched in three days, 

 showing that there is more than one annual brood. The interesting 

 point observed is that the early eggs are not laid like the late fall ones 

 in patches firmly adhering to the side of the vessel, but loosely and 

 separately, scattered mostly over the surface of the water. 



Occurrence of Culex aurifer Coq. — Mr. J. Turner Brakeley 

 writes that the last of the larvae of this species had completed their 

 transformation in May and no more would be found during the season. 

 He had pupae as early as April 28. As noted by Smith (Ent. News, 

 XV, 148, 1904), Mr. Brakeley finds the larvae in a cranberry bog 

 pool held by two dams at right angles to each other, the pool being 

 about sixty feet long by thirty feet wide. He has also found them in 

 a "five boy," an unusual place for mosquito larvae, since it contains 

 flowing water. A "five boy" is a pit, five by six feet and six feet 

 deep at the foot of a dam of a cranberry bog, into which the water 

 pours before entering the drainage trench. Dr. Geo. Dimmock has 

 collected the larvae at Springfield, Mass., under the number 2175. 



