24 INSECUTOR INSCITIylt MENSTRUUS 



long terminal spine; apical lobe low-conical, large, with dense 

 recurved or flattened short setae ; basal lobe quadrately ex- 

 panded, tubercular-setose, the setae longer and denser about 

 the marginal spine, which is stout and strongly recurved. Har- 

 pago with short hirsute stem, the filament rather broadly fusi- 

 form with pointed tip, about one-half as long as the stem. 

 Harpes and unci normal. Basal appendages rather long, with 

 five or six terminal and sub-terminal spines. 



Types, male and female, No. 22617, U. S. Nat. Mus. ; Prince 

 Rupert, British Columbia, May 11, 12, 1919 (H. G. Dyar). 



Larva: Head-hairs in twos (upper occasionally 3 or 1, 

 lower rarely 1). Lateral comb of the eighth segment of six 

 or seven large scales, each with long pointed tip, shortly and 

 sparsely fringed at base. Air-tube two-and-a-half times as 

 long as wide ; pecten of evenly spaced teeth, followed by a 

 5-haired tuft. Anal segment ringed by the plate, short and 

 quadrate, the ventral brush obliquely posteriorly directed. 



Larvae in muskeg-pools early in May. The larvae are small, 

 darkly colored, and occurred in considerable numbers in one 

 pool. 



Total, 85 specimens : Prince Rupert, British Columbia, May 

 11-31, 1919; Ketchikan, Alaska, June 20, August 6, 8, 1919; 

 Cape Fanshaw, Alaska, June 22, 1919 ; Juneau, Alaska, June 

 23, 1919. 



Aedes leuconotips, new species. 



Female : Head yellow-brown scaled, with whitish diffuse 

 spots at the sides. Mesonotum yellow-brown, with two diffuse 

 broad median dark brown bands ; posterior lateral stripes faint, 

 showing only traces. Abdomen with basal white segmental 

 bands, widening at the sides ; venter grayish white scaled. 

 Legs black, femora white beneath ; knee-spots white. 



Male: Ground-color scales paler than in the female and 

 sparser. Posterior lateral bands broad and distinct, similar 

 to the median ones. Venter mixed with black scales, predomi- 

 nating on tips of segment. Genitalia: Side pieces over three 

 times as long as wide, the clasp with long terminal spine; 



