318 NORTH AMERICAN BIRDS. 



(P. Tail rich blue-black. Hah. Guatemala and Nicaragua. 



A. cyanura Gould. Blue-tailed Hummingbird.' 

 rt'. Lower parts entirely uniform cinnamon. 



b\ Smaller: Wing 2.15-2.25, tail 1.40-1.50, exposed culmcn .80-.88. Hah. 

 Nicaragua, Salvador, Guatemala, Honduras, and southern Mexico, north 

 to Yucatan and Mazatlan. 



A. cinnamomea (Less.). Cinnamomeous Hummingbird.' 

 b\ Larger: Wing 2.50-2.70, tail 1.75-1.85, exposed culmcn .90-1.05. Hnb. 

 Tres Marias Islands, western Mexico. 



A. graysoni Lawr. Grayson's Hummingbird.' 



Gencs BASILINNA Boie. (Page 309, pi. XC, fig. 6.) 



(Species. 



Common Cuaracters. — Above metallic green, darker or duller on top of head ; 

 tail mainly chestnut or blackish, the middle feathers, however, with more or less 

 green ; a broad and very conspicuous white stripe behind eye, with a black, dusky, 

 or brownish one immediately beneath it, across ear-coverts. Adult males with fore- 

 head and chin black or deep blue, the throat and upper part of chest brilliant 

 metallic emerald-green. Adult females with top of head dull brownish (sometimes 

 tinged with green), and lower parts pale cinnamon, with or without green spots on 

 throat, or dull grayish white, with sides green. 



a'. Tail mainly chestnut ; posterior lower parts pale cinnamon. Adult male : Fore- 

 head and chin opaque black, or dull blue-black; middle tail-feathers chestnut 

 centrallj^, metallic green exteriorly, the rest without dusky subterminal bar 

 or spot. Adult female : Lower parts pale cinnamon, with or without green 

 spots on throat ; middle tail-feathers entirely green, the rest marked In- a 

 more or less distinct subterminal spot of dusky. Length about 3.30-3.50, 

 wing 2.00-2.10, tail 1.30-1.45, exposed culmcn. 65-.70. Nest about 1.50 in 

 diameter by about .80 in height, the cavity about 1.00 X ■55-.60 ; composed 

 of various soft vegetable fibres (especially raw cotton, spiders' webs, etc.), and 

 attached to small twigs. Ef/f/s .48 X -31. Hah. Southern portion of Lower 

 California 440. B. xantusi (Lawr.). Xantus's Hummingbird. 



fl'. Tail mainly blackish ; posterior lower parts dull whitish, mixed with grayish 

 brown and greenish. Adult male with forehead and chin deep rich blue ; 

 middle tail-feather entirely metallic green or bronze, the others tipped with 

 green or bronzy. Adult female : Lower parts dull light grayish, or grayish 

 white, more or less spotted with green, the sides almost continuou.sly of this 

 color; middle tail-feathors entirely green or bronzy, the others black, the 

 two or three outer ones tipped with dull grayish. Length, about 3.25-3.40, 



' Amazilia cyanura GouLD, Mon. Troch. pt. xviii. 1S50 (vol. v. pi. 315). 



» Ornitmga cinnamomea Less., Rev. Zool. 1842, 175. Amazilia cinnamomea Elliot, Class, i, Synop. Troch. 

 1S70, 210. 



'Amazilia (Pyrrhophitna) jrayioni Lawii., Ann. Lyo. N. Y., 18C7, 404. 



