692 APPENDIX. 



the other Totipalmates, we should naturally infer tliatit accompanies fish eatiuf? habits. 1 have nanieil this 

 genus for Mr. Wm. Brewster of Cambridge, whose life long studies of ornithology have been uf great and last- 

 ing benefit to students throughout the world, and who first called my attention to the external differences be- 

 tween the Rough-legs and the Squirrel Hawk. 



BREWSTERIA FERRUGINEUS. 

 Squirrel Hawk. 

 DESCRIPTION. 

 Sp. Ch. Size, large. Form, robust. Adult. Usual plumage. Upper parts, generally dark reddish 

 brown shaded with dusky. Tibiae, also dark brown, barred with dusky. Wings, plumbeous. Tail, white,, 

 tinged with ashy, partly shaded or stained with rusty red, sometimes with an indistinct band of dusky. 

 Lower parts, white, occasionally shaded with dusky. Young, grayish brown abuve, with the feathers mar- 

 gined with dusky. Basal half of tail, white, remainder grayish brown, more or less banded with dusky. 

 Legs and lower parts, white. Black phase, adult. Blackish brown throughout, more or less varied by red- 

 dish spottings and edgings, to the feathers, either tint prevailing. Tail, as in the normal phase. 



OBSERVATIONS. 

 Distinguished from the Rough-leg by the larger size, wide mouth ,and white tail, and from other Hawks 

 by the feathered tarsi. Occurs as a resident or partial migrant, throughout Western North America, north 

 to the Saskatchewan, south into Me.xico, east to Iowa and casually to Illinois. 



DIMENSIONS. 

 Length, from 22.2.5 to 23.50: stretch, ■"10.25 to. j.S.UO; wing. 1().30 to 17.25; tail, L».50 to 10.00; bill. 

 1.00 to 1.10 ; tarsus, 3.10 to 3.20. 



DESCRIPTION OF NESTS AND EGGS. 

 Nests, visually placed on trees, but occasionally on rocky cliffs, composed of sticks, weeds, etc., lined 

 with grass. E(5GS, three or four in number, spherical or rounded oval in form, creamy white in color, irreg- 

 ularly spotted and blotched with varying shades of brown. Dimensions, from 2.75 by 1.U5 to 2.50 by 2.00. 



BUTEO BRACHYURUS. 



Short-tailed Hawk. 

 DESCRIPTION. 

 Sp. Ch. Size, small. Three outer primaries are decidedly emarginate, the next slightly so as in the 

 Broad-winged. Normal color, dark umber brown above, but barred on the under wing and tail coverts with 

 white, with the feathers on the back of head and nape white at base. Tail, with six or eight bands of grayish. 

 Face, and most of the lower parts, white. Adult phase of plumage is nearly uniformly dark brown through- 

 out. Dimensions. Length, 16.00 ; wing, 13.00; tail, 7.00 ; tarsus, 2.00. Occurs regularly in Florida and 

 southward. 



GENUS ASTURINA STAR HAWKS. 



Gen. Ch. Proportions of Buteo, with the coloration of Astur. Wings, short ; tail, about three-fourths 

 as large as the wing and not emarginate nor graduated. Feet, stout. Sexes, similar. 



ASTURINA PLAGIATA- 



Mexican Goshawk. 

 DESCRIPTION. 

 Sp. Ch. Size, medium. Color. Above, light plumbeous, with dark, short lines to the feathers, and 

 faint, light wavy bandings. Upper tail coverts, partly white. Tail, black, white tipped and banded sometimes 

 irregularly, with white. Wings darker than the back. Beneath, including tibiae, wliite, closely and finely 

 banded, excepting on throat, with dark ash. Dimensions. Wing, from 10.00 to U.OO; tail, 7.50 to 8.00; 

 tarsus, 2.75 to 3.00. Readily distinguished from the Goshawk, which it somewhat resembles in general 

 coloration by the white and dark bands to the tail. Occurs in South-western United States, south to Cen- 

 tral America, and north occasionally to Illinois. 



