170 INSECUTOR INSCITI^ MENSTRUUS 



black, without scales, but with dense black hairs, those pos- 

 teriorly as well as on the fore coxae long. Abdomen entirely 

 black above and below, densely hairy. Legs black, bronzy 

 brown below. Wing scales black. 



Hypopygium. Side pieces three times as long as wide, 

 conical at tips. Apical lobe elliptical, not strongly elevated, 

 clothed with stout recurved clinging hairs. Basal lobe tuber- 

 cularly expanded, clothed with short strong curved setae, be- 

 coming longer at the inner angle, where in a dense tuft is a single 

 slender spine with curved tip. Claspette slender, moderate, the 

 filament short, thick, curved and sickle-shaped. Ninth tergites 

 moderate, with three long and two shorter spines at tip. 



Female. Head and mesonotum normally scaled, without 

 long hairs, which are absent also on the front coxae. The 

 vestiture of the mesonotum is coarse, and uniformly dark 

 bronzy brown. 



Larva. Head dark brown, the hairs single; ante-antennal 

 tuft in six. Lateral comb of the eighth segment of about 

 seven scales in an irregular row, each scale smooth and with 

 long central spine. Air-tube about three times as long as 

 wide or less, conical ; pecten of about nine teeth, followed by 

 one or two widely detached ones and a hair-tuft. Anal seg- 

 ment with broad dorsal saddle distinctly separated on ventral 

 line, although nearly touching; tufts preceding the ventral 

 brush running half way to base. Anal gills long, four. 



The larvae frequent flat shallow pools, occurring in one case 

 in a small drainage pool about 2 feet in diameter in a grassy 

 meadow, and again in shallow pools in grass, being very large 

 pools formed by the high water of a small lake. In both cases 

 hexodontus larvae occurred with them, and in the second in- 

 stance palustris larvae also. 



Additional data are as follows : Summit, Placer County. 

 California, issued from pupae, June 18, 19, 21, 32, 1980 

 (H. G. Dyar). 



Aedes (Heteronycha) increpitus Dyar. 



Additional data are as follows : Tahoe City, California, June 

 12-20, 1920 (H. G. Dyar). 



