206 
TETRAONINiE. LAGOPUS. 
outer web, secondaries tipped and barred with white ; tail white, at 
the base variegated, the two middle feathers like the back ; loral space, 
and a band behind the eye yellowish-white, a dusky streak under the 
eye ; throat reddish-white, with dusky spots ; fore parts and sides of 
neck barred with dusky and reddish-white ; on the breast the dusky 
spots become first curved, and then arrow-shaped; and so continue 
narrowing on the hind part of the breast and part of the sides, of which 
the upper portion is barred ; abdomen, lower tail-coverts, and axillars, 
white ; tarsal feathers light brownish-grey, faintly barred with whitish. 
Female smaller, but similar to the male, with the tints duller. 
Male, I7h 23. 
Missouri, Lat. 41°, to Slave Lake, Lat. 61°. Rocky Mountains. Abund- 
ant on the Saskatchewan Plains. Accidental in the northern parts of 
Illinois. Resident. 
Tetrao Phasiaiiellus, Bonap. Amer. Orn. v. iii. p. 37 . 
Tetrao Phasianellus, Bonap. Syn. p. 127. 
Tetrao (Centrocercus) Phasianellus, Sharp-tailed Grouse, Swains. & Rich. F. Bor. 
Amer. v. ii. p. 361. 
Sharp-tailed Grouse, Nutt. Man. v. i. p. 669. 
Sharp-tailed Grouse, Tetrao Phasianellus, Aun. Orn. Biog. v. iv. p. 569. 
GENUS II. LAGOPUS. PTARMIGAN. 
Bill short, robust ; upper mandible with its dorsal outline 
decurved, the ridge indistinct and rounded, the sides convex, 
the edges overlapping, the tip decimate, thin-edged, round- 
ed ; lower mandible, with the angle of moderate length and 
rounded, the dorsal line convex, the sides rounded, the edges 
a little inclinate, the tip rounded ; nasal sinuses large and 
covered with feathers, leaving the ridge narrow between 
them. Nostrils basal, roundish, concealed by the feathers. 
Head small, ovate ; neck rather long ; body bulky. Feet 
rather short, stout ; tarsus feathered, as are the toes, which 
have two or three terminal scutella ; hind toe extremely 
short, lateral toes equal. Claws slightly arched, depressed, 
thin-edged, rounded. Plumage full and compact, the feathers 
rounded. Wings short, convex, the primaries strong, nar- 
row, tapering, the third longest, the fourth and second little 
shorter. Tail short, nearly even, of more than twelve broad 
feathers. 
