Apia, ’is] 
COCKERELL: COLORADO MOSQUITOES 
197 
between Gypsum and Glenwood Springs, via Cottonwood 
Pass road, July 16. 
(b) Pitkin County. One mile southwest of Aspen, July 22; 
Crystal River, one mile above Red Stone, July 27. 
(c) Garfield County. Three or four miles above Carbondale, 
July 19; 13 miles above Glenwood Springs, on Grand 
River, August 2; 2\ miles north of Rifle, July 25. 
(B.) Wyoming (J. Henderson and E. Schwabe). 
(a) Bottom lands at Basin, August 29. Aedes nigromaculis, A. 
curriei and A. vexans. 
(b) Box Elder Creek, 19 miles west of Douglas, August 25. 
(c) Shell Creek, five miles above Shell, September 2. Aedes 
vexans. 
(d) Dry mesa three miles north of Ten Sleep, August 28; Creek 
bottom three miles east of Ten Sleep. 
(e) North Platte Bridge, about 8 miles northeast of Wheatland, 
August 24. Aedes in bad condition; one at least is curriei , 
some seem to be vexans. 
On September 6, Dr. Chas. N. Meader kindly took me in his car to 
visit the localities occupied by troops in the vicinity of Denver. The 
following were examined with some care: 
(a) Camp Baldwin. Could not find any species breeding, but in 
a dried up marsh, among tall reeds, were great quantities of 
mosquitoes. We caught ten females, and all were Aedes vexans 
(sylvestris ), which did its best to justify its name. 
(b) Fort Logan. Examined all pools by the river and pond near 
Fort, and obtained no culicids, larvae or adults. The weather 
had been extremely dry, and the river had fallen, leaving many 
small pools, which were, however, full of fishes and frogs. We 
later learned that the pools about the camp had been oiled 
“every now and then” by the military authorities, but on 
September 6 we found little evidence of oil. 
(c) Rifle range, near Golden. Could not find any species breeding. 
Caught a $ Aedes vexans and a male Culex tar satis. 
Our general impression was that Culicidae were relatively scarce in 
the region, and where they occurred, they could very easily be dealt 
with. Another species, Theobaldia inornata, has been taken by Tucker 
at Denver. 
Other collections were made at Boulder, Longmont and Brainerd 
Lake in Boulder County. On September 9 my wife and I examined 
Boulder Canyon from the mouth upward a distance of over three 
miles. The creek had fallen recently, and small pools were left, with 
very young fish in them. No culicids were found breeding, nor were 
