144 ENTOMOLOGICAL SOCIETY 



The usual form we have from many other places, such as St. 

 Anthony Park, Minn. (F. L. Washhurn) ; Center Harbor, N. H. 

 (H. G. Dyar) ; Durham, N. H. (H. G. Dyar) ; Ithaca, N. Y. 

 (O. A. Johannsen) ; Saranac Tnn, N. Y. (O. A. Johannsen) ; 

 Lahaway, N. J. (J. T. Brakeley) ; Baltimore, Md. (Dyar and 

 Caudellf; Washington, D. C. "(H. G. Dyar); St. Asaph, Va. 

 (F. C. Pratt), in temporary pools, roadside puddles, water bar 

 rels, etc. The second form has been mentioned by Dr. John B. 

 Smith.* as collected by him at Lahawav, N. J., and he considers 

 it specifically distinct from restuans. The differential character 

 which he mentions between the labial plates of the two forms is, 

 however, not existant in our specimens. 



These forms are, we think, not specifically distinct, as we have 

 some specimens that indicate an intergradation of the characters. 



Culex impiger Kirby. 



1. The usual form has the air tube about two-and-a-half times 

 as long as wide, thick, tapered outwardly, the pecten followed bv 

 a single tuft. Anal segment with slight tufts before the barred 

 area. The lateral comb of the Sth abdominal segment consists of 

 a large patch of small spines over three rows deep. On the head 

 the upper frontal tuft consists of six hairs, the lower of three, the 

 one near the antennae of seven. 



2. The other form has the air tube of the same proportions, but 

 the pecten Iras three or four large detached teeth which extend 

 well beyond the tuft, almost to the apex of the tube. There are 

 besides on the ventral aspect, two small tufts and two rows of 

 long tufts on the dorsal side. The anal segment has ventral tufts 

 almost to the base. The lateral comb of the Sth abdominal seg 

 ment consists of a small patch of large, thorn-shaped spines in an 

 irregular double row. The head hairs have three in the upper 

 frontal tuft, one in the lower, seven in the tuft near the antenna;. 



The first form we have abundantly irom Kaslo, B. C.,f the sec 

 ond form from Kaslo also, and from Springfield, Mass., where it 

 was collected by Dr. Geo. Dimmock, under the number 2173. 

 At present the adults have not been separated ; but in this case 

 we hope that they may yet prove to be distinguishable, for our 

 bred series of the second form is very small and not well pre 

 served. Better material may show differences. The larvae are 

 certainly abundantly distinct. 



*Ent News, xni, p. 303, 1902. 



t Dyar, Proc. Ent Soc. Wash., vi, p. 37, 1904. 



