8-1 INSECUTOR INSCITI.5; MENSTRUUS 



rounded at tip ; apical lobe large, prominent, with short curved 

 setae ; basal lobe large, conical, evenly setose. Harpagones 

 long, the basal part of shaft minutely setose, other half smooth ; 

 filament sickle-shaped, with an angular membrane at the base 

 outwardly. 



Female. — Similar, the mesonotum overspread with brown, 

 but showing also subdorsal short posterior brown stripes; 

 venter of abdomen nearly all pale scaled, showing only traces 

 of black apical bands and median stripe. 



Larva with the head-hairs double or the lower in threes; 

 pecten of the tube even, followed by a tuft of five hairs ; anal 

 segment ringed by the plate ; comb-scales six, each with a very 

 sharp central spine and slight lateral fringes. 



Egg: Narrowly fusiform, smooth, not angled, one side flat- 

 tened, ends roundedly pointed, the micropylar end blunter, 

 shortly conical at tip, which has a small mucilaginous cushion ; 

 sculpturing fine and obscure ; black, shining, laid singly. 



This species is quite distinct. The coloration of the mesono- 

 tum is variable, distinctly banded or all dark brown or all 

 golden yellow. The banded form is similar to tahoensis, las- 

 arensis, and piillatiis, while the suffused brown form resembles 

 impiger. Some specimens are very difficult to distinguish from 

 tahoensis, though in general the coloration is yellower. The 

 venter of the abdomen is commonly all white or with paired 

 apical black marks. The median black band is only very rarely 

 present. The male genitalia resemble campestris, while the 

 larva falls close to abserratus. 



Type, Cat. No. 20353, U. S. Nat. Mus. 



Bred from early spring pools in muddy hoof-marks in the 

 edge of a marsh, in shallow grassy pools in a glade under 

 poplar trees and, rarely, in pools along the lake filled by high 

 waves and in mountain pools with tahoensis. All these pools 

 of a temporary character. Fallen Leaf, Lake Tahoe, Cali- 

 fornia, last part of May and first of June, 1916. 



Aedes ventrovittis, new species. 



Female. — Integument black. Head with flat white scales 

 low on the sides, all the vertex with very narrow curved sparse 



