APPENDIX. 691 



it ilifi'ers in tlie presence of gray instead of reddish bands above, which alternate with the blacli. This form 

 has riglitly been considenid Mr. Brewster's, by whom it has recently been described, as a distinct species on 

 account of its isolated range, it being confined to Newfoundland. 



MELEAGRIS GALLOPAVO OSCEULA. 



Florida Wilh Turkey. 



DESCRIPTION. 



Sub Sp. Ch. Form and size similar to that of the Wild Turkey but darker, with the white on the 



wings more restricted, the black predominating, the white being present only as detatched, narrow, broken 



bars, not reaching the shaft of the feather. 'J'he above form, which occurs in Florida, has been separated by 



Mr. W. £. D. Scott in the Auk, Vol. VII, 18!»0, p. 37(1. 



BUTEO BOREALIS KRIDERII. 

 Kr[der's Hawk. 



DESCRIPTION. 



Sub Sp. Ch. Size and general form, .'iimilar to that of the Red-tail, but differs in being pure white 

 beneath, without any rufous tinge, with the spots across abdomen being indistinct or lacking. Above, 

 lighter, with the white predominating. Upper tail coverts, pure white, and the tail is pale reddish, with 

 the terminal band either represented by a few spots, or wanting. Young, differ in being snowy white be- 

 neath, lighter above, and whitish on the tail Occurs on the Great Plains from Minnesota to Southern 

 Texas, casually to Illinois and Iowa. 



BUTEO BOREALIS CALURUS. 



Western Red-taii,. 

 DESCRIPTION. 

 Sub Sp. Ch. Darker than the comm^'U Red-tail excepting tail and upper coverts, but some specimens 

 occur which are lighter and which are scarcely to be distinguished from B. borealis. Young, more heavily 

 spotted beneath than those of the Red-tail, sometimes wholly dusky excepting the tail. Tail of adult oliva- 

 ceous, with a black sub-terminal band arid frequently with more or less complete bars. Occurs in Western 

 North America occasionally as far east as Illinois. 



GENUS BREWSTERIA. WIDE-MOUTHED HAWKS. 



Tarsus, feathered to the toes as in A rchibuteo, but proportionately longer, exceeding the length of the 

 middle toe and claw, not being about equal to it as in Archibuteo. The bill is much stouter and wider at the 

 base, 1.70 to 1.90 measured from corner to corner ( A. lagopus measures from 1.35 to 1.45 ) and the gape ex- 

 tends to a point about midway under the eye ( in A. lagopus it reaches but a little beyond the corner of the 

 eye. ) The sterno-trachealis is remarkably stout and thick, not slender and weak as in Archibut«o. The 

 proventriculus is not large and is provided with simple oval glands arranged in a zonular hand about 1.25 

 wide. These glands are not elevated into ridges as in Archibuteo. Type. B. ferrugineus from a specimen 

 in the collection of Mr. Wm. Brewster. 



I have above briefly indicated some of the chief differences between these two genera, but there are other 

 characters which I shall give more at length later elsewhere. The most remarkable external difference be- 

 tween these two genera will be found in the wide gape and elongated tarsus. Internally the large thick sterno- 

 trachealis would indicate that the Squirrel Hawk has a louder voice than the Rough Leg, but a more 

 remarkable difference, and one which any one familiar with the anatomy of our Birds of Prey, will consider 

 at least of great generic importance, is the fact that in Archibuteo we find the glands of the proventriculus 

 elevated into five longitudinal ridges which are absent in Hrewsteria. This elevation of the glaTids into ridges 

 occurs in two other genera of North American Birds of Prey which I have examined, namely, in Pandion 

 and Hallaeatus, both fish eaters. As we also find this charactei- is same of the Herons, Gannets, and many of 



