

Insecutor Inscitiae Menstruus 



Vol. VIII OCTOBER-DECEMBER, 1920 Nos. 10-12 



THE AEDES OF THE MOUNTAINS OF CALIFORNIA 

 AND OREGON 



(Diptera, Culicidce) 

 By HARRISON G. DYAR 



During the summer of 1920 further observations were made 

 on the pecuHar mosquito fauna of the CaHfomian mountains. 

 I have referred to this fauna twice previously (Ins. Ins. Mens., 

 iv, 80-90, 1916 ; v, 11-21, 1917), but the males of a number of 

 the species remained unknown. These have now been ob- 

 tained. 



The central part of the fauna lies in the Lake Tahoe region. 

 Northward of this two of the species {cataphylla and fisheri), 

 and possibly a third (vcntrovittis), drop out; but the fauna 

 extends northward at least as far as the mountainous area 

 about Crater Lake in Oregon. 



Aedes (Heteronycha) tahoensis Dyar. 



This is allied to lasarensis Felt & Young, my comparison 

 with pullatus Coquillett (Ins. Ins. Mens., v, 11, 1917) being in 

 error, due to a misapprehension of pullatus at the time. The 

 coloration of the mesonotum is gray, mixed with brown or 

 yellow-brown, the blackish lines usually distinct, frequently 

 with gray spots on each side. The form should possibly be 

 classified as a race of lasarensis, Acdes lasarensis tahoensis 

 Dyar. The coloration is as in the western form of lasarensis, 

 which occurs as an occasional variety in the Rocky Mountain 

 region. In tahoensis the normal coloration of lasarensis is not 

 seen. In the Alaskan race, borealis Ludlow, there is extreme 

 variation, occasionally matching the tahoensis coloration, but 



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