82 INSECUTOR INSCITL^ MENSTRUUS 



later, larvae and pupae of tahocnsis and hexodoritus being taken 

 there on July 2, 1916, in about the same stage that they were 

 taken at Fallen Leaf on June 1, 1916, 



Aedes tahoensis, new species. 



Male. — Integument black. Occiput with flat yellowish white 

 scales on the sides, narrow curved ones on the vertex, the erect 

 forked scales on the nape also pale ; bristles at vertex pale, 

 those along the eye-margins black. Mesonotum with narrow 

 curved scales rather sparse, pale yellow-brown, paler on the 

 sides and around the antescutellar space; two bands of dark 

 brown, narrower scales, separated by a double row of normal 

 pale scales on each side of the median bare groove ; two similar 

 shorter bands posteriorly subdorsally. Abdomen black, with 

 broad basal segmental white bands; venter white scaled, the 

 apical halves of the segments black. Legs black, femora whit- 

 ish within ; tibiae with some white scales, especially inwardly. 

 Length of wing, 4.5 mm., the wing scales black. 



Genitalia : Side pieces over three times as long as wide, 

 rounded at the tip; apical lobe prominent, with a few short 

 setae ; basal lobe fan-shaped, with a row of setae, a stout spine 

 on the dorsal aspect ; clasp filament slightly fusiform, curved, 

 with a terminal inserted spine. Harpagones arising ventrally, 

 long, the basal half of shaft minutely pilose, curving dorsally, 

 the apical part of shaft smooth; filament sickle-shaped, with 

 a sharp point, at base a slight double membranous ridge. 



Female. — Similar, the venter of abdomen entirely pale scaled. 



Larva with the central spine of the comb scales not larger 

 than the others, the scale quite evenly feathered; upper head 

 hairs in threes, lower single ; anal segment not ringed ; pecten 

 of tube evenly spaced, followed by an 8-haired tuft. 



Egg: Narrowly fusiform, evenly margined, not angled, one 

 side a little flattened ; antemicropylar end blunt, the other 

 shortly conical with an annular mucilaginous cushion, the tip 

 truncate ; black, smooth, laid singly. 



Type, Cat. No. 20352, U. S. Nat. Mus. 



Closely allied to A. lazarensis Felt and Young and possibly 



