THE HUMMING BIRDS. 331 



two birds; and it seems to me that, in. the absence of structural char- 

 acters, as well as those of coloration (further than the slight one noted), 

 suggesting hybridism between G. anna or any other species, T. viola- 

 jugulum may ..properly be regarded as a distinct species until more de- 

 cided evidence to the contrary is obtained. 



FIG. 47.- Outer tail feathers of (1) Oalypte anna, (2) Trochiltis colubris, (3) T. violajiiglum, and 



(4) T. alexandri. 



BLACK-CHINNED HUMMING BIRD. Trochilus alexandri BOURC. and MULS. 



Trocldlns alexandri BOURC. and MULS., Ann. Soc. d'Agric. de Lyon, ix, 1846, 330. 

 CASS., Illustr. B. Cal. &c. I, 1854, 141, pi. 22. GOULD, Mon. TrocC. pt. xiv, 1857, 

 pi. 4 ; vol. in, 1861, pi. 132. COOPER, Orn. Cal. I, 1870, 353. B. B. and R., Hist. 

 N. Am. B. n, 1874, 450, pi. 47, fig. 1. 



Alexandre's Humming Bird. 



Pnrple-throated Humming Bird (GOULD, CASSIN). 



L'Ornismye d'Alexandre (MULSANT and VERRTCAUX). 



Chupamirto de pecho morado (D'OcA). 



RANGE. Western United States, between Eocky Mountains and Pa- 

 cific coast ; east to central Texas and Uintah Mountains, Utah 5 north 

 to latitude 49, in British Columbia, between Cascade and llocky Moun- 

 tains ; breeding as far south as Guaymas, Sonora,; wintering in west- 

 ern, central, and southern Me<xico. 



SP. CHAR. Adult male: Chin and throat opaque velvety black, 

 bordered below by a broad baud of metallic violet, changing to green 

 and blue; tail slightly forked or emarginated (depth of fork only about 

 0.10 of an inch); length about 3.30-3.75, wing 1.70-1.75, tail 1.20-1.25, 

 culmen 0.70-0.75. Adult female: Tail much rounded, the middle feath- 

 ers about the longest; plumage not essentially different from that of 

 female T. colubris ; length about 3.90-4.10, wing 1.90-2.00, tail 1.20-1.35, 

 culmen .78-.90. Young: Similar to adult female, but feathers of upper 

 parts margined terminally with light buffy or pale rusty, the male with 

 throat streaked with dusky. 



Adult male (No. 117256, Final County, Arizona, April 9, 1885; W. 

 E. D. Scott) : Above very dull bronze-green, the top of the head more 

 dusky and quite destitute of metallic gloss on forehead; reiniges dusky 

 slate, slightly glossed with purple; rectrices (except middle pair) pur- 

 plish black, margined terminally with dull bronze-green, this most 

 extensive on lateral feathers. A small white spot behind eye. Chin, 

 upper half of throat (for about .45 of an inch from point of chin), sub- 

 orbital region, and ear-coverts, opaque velvety black ; lower part of 



