BIRDS OF NORTH AND MIDDLE AMERICA. 299 



//". Throat usually pale yellow; general color above darker and l)rowner, 

 w itli hindneck, etc., more vinaceous. (Breeding from western shores 

 of Hudson Bay to valley of Mackenzie River; migrating southward to 

 New York, Ohio, Michigan, Kansas, Utah, and Nevada.) 



Otocoris alpestris hoyti i p. 306) 

 e. Smaller (wing averaging less than lOG mm. i 

 /. AVing averaging more than 102 mm. 



(J. Paler, witli color of back less strongly contrasted with that of hind- 

 neck and median lanceolate stripe of Ifinger upper tail-coverts much 

 narrower and paler. 

 h. Slightly paler and grayer, and averaging slightly smaller (wing 

 101-107.5, averaging 104.8). (Breeding in Saskatchewan, Assin- 

 iboia, southwestern Manitoba?, and extreme northern portion 

 of North Dakota; migrating southward to Colorado, Kansas, Utah, 



and Colorado.) Otocoris alpestris enthymia (p. 308) 



hh. Slightly darker and browner, and averaging slightly larger (wing 

 101-110, averaging 105.8). (Central arid districts of United 

 States, from western Dakotas, Nebraska, and Kansas, to Idaho 

 and Nevada and northward on eastern side of Rocky Mountains 

 to Alberta; migrating southward to Texas, Chihuahua, Sonora, 

 and southeastern California.). . Otocoris alpestris leucolsema (p. 309) 

 gg. Darker, with color of back more strongly contrasted with that of 

 hindneck and more heavily or darkly streaked, and median 

 lanceolate stripe of longer upper tail-coverts much broader and 

 darker. 

 h. Slightly paler, especially color of hindneck, and with pinkish area 

 on lower rump more extended; sides and flanks browner or more 

 vinaceous; slightlylarger (wing 100-108, averaging 104.2). (Breed- 

 ing in southern Canada, from Manitoba to southern Labrador, and 

 southward to Long L'^land, Pennsylvania, Ohio, Kentucky, east- 

 ern Kansas, etc. ; migrating southward to South Carolina, central 

 Texas, etc., and westward, casually, to Colorado and Arizona.) 



Otocoris alpestris praticola (p. 311) 

 Jih. Slightly darker, especially color of hindneck, and with jsinkish 

 area on lower rump more restricted; sides and flanks grayer; 

 slightly smaller (wing 98.5-106, averaging 102.9). (Northwest- 

 ern semi-arid districts of United States, from western Nevada 

 through Oregon and Washington east of Cascade Mountains to 

 south-central British Columbia and northern Idaho and north- 

 western Montana; to central California in winter.) 



Otocoris alpestris merrilli (p. 315) 

 ff. Smaller (wing averaging less than 100 mm.); throat brighter yellow. 

 g. Color of hindneck, etc., duller and grayer, less strongly contrasted 

 with color of back, the latter much grayer; superciliary stripe 

 usually yellow or tinged with yellow, and breast frequently more 

 or less yellowish; slightly smaller (wing 92-102, averaging 96.8). 

 (Coast of Texas, from Galveston Bay to across mouth of Rio Grande, 



in Tamaulipas, Mexico.) Otocoris alpestris giraudi (p. 314) 



gg. Color of hindneck, etc., brighter and more vinaceous, more strongly 

 contrasted with color of back, the latter browner or more buffy; 

 supemiliary stripe and breast always (?) pure white; slightly larger 

 (wing, 96.5-103, averaging 99.4). (Eastern and southeastern Mex- 

 ico, in southern Tamaulipas, Hidalgo, and Oaxaca.) 



Otocoris alpestris diaphora (^p. 313) 



