Description of Neiu Birds from Mexico. 63 



rusty brown to dull tawny brown on outer quills ; wing coverts dull brown 

 with shaft lines and spots of dull tawny brown at tips. Under coverts 

 and axillars pale buffy ; inner webs of quills at base still paler buffy, be- 

 coming grayish brown on outer half; tail and upper tail coverts light 

 rusty brown. Lores and malar patch pale, dull grayish-white, shaded 

 with dingy fulvous ; under eyelids blackish ; ear coverts dark olive-brown 

 washed with blackish; chin, throat, and patch on middle of breast whitish 

 washed with fulvous; feathers bordering breast-patch scantily black 

 tipped; sides of throat, breast (except whitish patch), chest, and flanks 

 dingy butty. Abdomen pale buffy, crissum darker, richer buffy. 



Dim, nsions of type. — Wing 114 ; tail 43 ; culmen 28 ; tarsus 47. 



This species is most like G. me.cicana, from which it is distinguishable 

 by its generally paler colors ; obsolescence of ashy on crown and nape ; 

 much scantier black margins to feathers on dorsal surface, and shorter 

 tarsus. 



Amazilia cinnamomea saturata subsp. now Chiapas Humming Bird. 



Type No. 155297, U. S. Xat. Mus. Biological Survey Coll. Ad. tf, Hue- 

 huetan, Chiapas, Mexico, March 2, 1890. Collected by E. W. Nelson and 

 E. A. Goldman. 



Distribution.— Heavily forested foothills on Pacific coast of Chiapas, near 

 border of Guatemala. 



Description. — Back and wing coverts dark coppery bronze; wings dark 

 purplish ; entire lower parts rich dark cinnamon, approaching chestnut, 

 throat a little paler; tail very dark chestnut with broad tips of dark 

 bronze. 



Measurements of type. — Wing 55 ; tail 36; culmen 22.5. 



The following average measurements show the relative sizes of Amazilia 

 cinnamomea from western Mexico, north of Tehuantepec, and the new 

 form : 



A. cinnamomea, adult $ (7 specimens) : wing 57.9 ; tail 36.6 ; culmen 22. 

 A. c. saturata, adult $ (3 specimens from Huehuetan, Chiapas) : wing 55 ; 

 tail 35; culmen 22.3. 



This form differs from typical cinnamomea mainly in its much darker or 

 more intense colors ; its wings and tail are a little shorter, and the bill is 

 proportionately longer. 



At first I was inclined to consider this bird Trochilus corallirostris Bourc. 

 and Muls. (Ann. Sci. Phys. et Nat., Lyons, IX, p. 328, 1841)), which was 

 described from a specimen taken at Escuintla, Guatemala. Upon looking 

 the matter up, however, I find that Mr. Elliot described the type of T. 

 corallirostris in his Synopsis of the Humming Birds (p. 119) under Amazilia 

 cinnamomea. The measurements of Bounder's type, as given by Elliot and 

 reduced to millimeters, are as follows : Wing 57.1 ; tail 44.5 ; culmen 22.2. 

 These measurements indicate that it is true cinnamomea. The discrepancy 

 in the length of the tail compared with my averages is due to a difference 

 in methods of measuring. The series of true A. cinnamomea contains 

 specimens from various localities in western Mexico between Mazatlan 



