68 CALIFORNIA ACADEMY OF SCIENCES [Peoc. 4th Ser. 



Other species at these points. I am incHned to class the birds 

 of this region as representing an intergradient stage between 

 typical spilurus of the coast region and drymoecus of the inte- 

 rior. The plumage, normally of a less bright rufescence than 

 in the former, is still further modified by the action of the 

 smoke, producing the extremely dark effects seen in the speci- 

 mens at hand. Of the available skins from the east side of 

 San Francisco Bay, practically all were secured at suburban 

 points in the various towns, where they would be subject to the 

 effects of the smoke of the communities. There is one speci- 

 men in the series that forms a striking exception to the above 

 remarks. This is no. 4284, coll. Mus. Vert. Zool., collected 

 by Dr. J. G. Cooper, at Martinez, Contra Costa County, De- 

 cember 15, 1863. This bird is bright, clear reddish above, 

 closely similar to certain of the Palo Alto specimens, and even 

 brighter colored than many from that point. It shows no sign 

 of smoke stain. This latter fact may possibly be due to the 

 fact of there being less smoke in the atmosphere in this general 

 region at that early date. 



There are in the series four specimens from the vicinity of 

 Monterey Bay, three from Pacific Grove and one from Monte- 

 rey. This is too small a series to draw conclusions from, but 

 one of these birds (coll. J. & J. W. Mailliard, no. 4691) dis- 

 plays what appears to be a distinct trend toward the colora- 

 tion of charienturus. 



Thryomanes bczuicki drymoecus Oberholser 



Type locality — Baird, Shasta County, California. 



Range — The central portion of California; the Sacramento 

 Valley, and northward at least to the Oregon boundary ; north- 

 east to the Warner Mountains, on the Nevada boundary; the 

 west slope of the central Sierra Nevada, everywhere below 

 Transition ; southward over about the northern half of the San 

 Joaquin Valley. Specimens from the east slope of the Sierra 

 Nevada at Carroll Creek, taken in September, may have been 

 wanderers from the west side of the mountains, ana not neces- 

 sarily within the normal breeding range. 



Specimens examined from the following localities : Modoc 

 County: Cedarville, 2; Sugar Hill, 1. Trinity County: Hel- 



