^0. 2.1 HOFFMAN ON THE BIRDS OF NEVADA. 237 



Pyrocephahis rubineus mexicanus (Scl.) Coues. — ^Vermilion Flycatcher. 



The probable discovery of this bird at Fort Mojave on May 24, its cap- 

 ture in the Colorado Valley, at latitude 34°, on the 18th of April, and the 

 statement by Heerman that it is quite common at Fort Yuma during the 

 spring, is sufficient evidence to consider it a visitant species. 



" The North American species, originally supposed to be identical vrith 

 that iidiabiting South America, has lately been described by Dr. Sclater 

 as distinct." Dr. Cooper further suggests that " it may, however, per- 

 haps be fairly questioned whether here, as in many other instances, there 

 is anything more than a slight difference produced by peculiarities of 

 climate, &c." 



TKOCHILID^. 



TrocMlus alexandri Bourc and Muls. — The Black-chinned Hummingbird. 

 Was found in the valleys of the northern interior of the State. Dr. 

 Cooper did not find it at Fort Mojave, but states that it has since been 

 obtained in the Colorado Valley by Mr. Holder, on the 20th of March. 

 The species closely resembles the Eastern Ruby-throat {T. coUibris). 



Calypte costce (Bourc.) Gould. — Costa's Hummingbird. 



Was observed at Fort Mojave by Dr. Cooper, but is not common ; is 

 said to be extremely abundant at Cape Saint Lucas, occurring also on 

 the eastern side of the Gulf of California, at Guaymas, «S:c. 



Selasphorus platycercus (Swains.) Bonap. — Broad-tailed Hummingbird. 

 Observed on the Euby Mountains by Mr. Ridgway, where it was 

 found in company with Stellula calliope. 



SelaspJionm rufus (Gmel.) And. — Rufous Hummingbird. 



Found by Mr. Ridgway among the sun-flowers {Helianthus) in the 

 Valley of the Truckee, in August ; also, later in the season, in the caiions 

 of the West Humboldt Mountains. 



Stellula calliope Gould. — Calliope Hummingbird. 



This species was noticed at Prospect Hill, and again in Owen's Val- 

 ley, California, where it was found breeding in July. One nest with 

 eggs was found perched over and within a short distance of a noisy 

 mountain stream, where it was no doubt frequently subjected to the 

 dashing spray. Mr. Ridgway found this bird on the Ruby and East 

 Humboldt Mountains, at an altitude of from 7,000 to 10,000 feet. 



CYPSELID^. 



Cypsehis saxafilis Woodh. — White-throated Swift. 



Rather common in the more elevated regions, building in and about 

 the fissures and projections of cliffs; was noticed again in the upper 

 portion of the Black Canon of the Colorado Valley, in September. Dr. 



