art. 1. MOSQUITOES OF THE UNITED STATES—DYAR. 59 
served swarming as late as 9 a. m. in bright sunlight, although in 
deep forest and shaded by the trunks of large trees. The females 
bite by day or night, as with any other forest mosquito. 
Distribution—Pacific coast, from Washington to Alaska. 
United States Records. 
WASHINGTON: Longmire Springs, June 17, 1917 (H. G. Dyar). 
Ashford, August 1, 1906 (Dyar and Caudell). 
Hoquiam, May 27, 1904 (W. EH. Burke). 
Lake Cushman, June 27, 1917 (H. G. Dyar). 
AEDES (HETERONYCHA) HEXODONTUS Dyar. 
Aédes hexodontus Dyar, Ins. Ins. Mens., vol. 4, p. 83, 1916. 
A rather large blackish mosquito. Mesonotum dark yellow, with 
two narrow separated brown lines, which may be wanting, leaving 
the surface entirely yellow, sometimes pale golden yellow; otherwise 
suffused with dark brown, or wholly dark brown. Abdomen black, 
the basal segmental white bands more or less constricted centrally, 
widening to lateral spots; venter whitish, with more or less distinct 
blackish apical segmental banding. Legs black, the femora white 
beneath, and with narrow white tips. Wing scales all dark. 
The larvae do not appear till the snow is all gone, hatching in 
shallow pools in meadows or marshes or along streams, seldom very 
many larvae in any one pool. The adults will bite in the daytime in 
shaded places; but their favorite time of flight is after sunset when 
the darkness 1s almost complete. For half an hour or more they 
will come in numbers at this time, then diminish again. The males 
swarm before sunset, low near the ground behind bushes or tree 
trunks which the sun is still shining weakly through. After sunset 
they disappear. 
This species is closely allied to punctor in the structure of the male 
genitalia and larvae. The adult coloration is generally not the same. 
Distribution—Mountains of California and Oregon. 
United States Records. 
CALIFORNIA: Fallen Leaf Lake, Eldorado County, June 10, 1916 (H. G. Dyar). 
Tahoe City, Placer County, June 17, 1920 (H. G. Dyar). 
Gold Lake, Sierra County, June 28, 1920 (H. G. Dyar). 
Gold Lake Camp, Plumas County, June 27, 1920 (H. G. Dyar). 
Camp Elwell, Plumas County, June 27, 1920 (H. G. Dyar). 
Lakes Center Camp, Plumas County, June 25, 1920 (H. G. Dyar). 
OREGON: Crater Lake, July 29, 1920 (H. G. Dyar). 
Engineers’ Camp, above Whiskey Creek, May 24, 1921 (H. G. Dyar). 
AEDES (HETERONYCHA) FISHERI Dyar. 
Aédes fisheri Dyar, Ins. Ins. Mens., vol. 5, p. 19, 1917. 
A rather small black mosquito. Mesonotum dark bronzy brown. 
Abdomen black, the basal segmental bands yellowish, narrowly 
