BIRDS OF NOETH AND MIDDLE AMERICA. 301 



/. Larger (wing 103.5-110.5, averaging 100.4). (Central New Mexico and 

 Arizona, south in winter to northern Sonora and Chihuahua and 



northwestern Texas.) Otocoris alpestris occidentalis (p. 324 j 



ff. Smaller (wing 97-105.5, averaging less than 103). 



g. Lower back distinctly streaked. (States of Durango, Chihualiua, 

 and Coahuila, north-central Mexico, to southwestern New Mexico 



and southeastern Arizona.) Otocoris alpestris aphrasta (p. 326) 



gg. Lower back very obsoletely streaked. 



h. Darker and more rufescent (nearly uniform vinaceous-cinnamon, 

 more vinaceous on hindneck, etc.). (South-central Arizona in 

 summer, northern Sonora and Chihuahua in winter.) 



Otocoris alpestris adusta (p. 325) 

 hh. Paler and more cinnamomeous (nearly uniform light vinaceous- 

 cinnamon, the back and wings light buffy brown or wood brown.) 

 (Shores of Gulf of California, in northwestern Sonora; Santa 

 Rosalia Bay, Lower California?). . Otocoris alpestris pallida (p. 326) 

 ee. Pak'r, the color of hindneck, lesser wing-coverts, etc., salmon-buff or 

 vinaceous-buff. (Valley of Colorado River, from northeastern Lower 

 California and southwestern Arizona to southern Nevada.) 



Otocoris alpestris leucansiptila (p. 327) 

 hb. No sharjaly defined black patch on anterior portion of crown, the black area on 

 sideof head and that on chest reduced in size and duller black. (Adult females.) 

 c. General color above decidedly cinnamomeous. 



Otocoris alpestris rubea, adult female (p. 322) 

 cc. General color above grayish or buffy brownish. 

 d. Wing averaging less than 100 mm. 



e. General color above decidedly gray, even the lesser wing-coverts not cinna- 

 momeous or vinaceous . . . .Otocoris alpestris giraudi, adult female (p. 314) 

 ee. General color above more or less buffy or brownish, the lesser wing-coverts 

 more or less cinnamomeous or vinaceous. 

 /. Back broadly striped with black; under parts usually more or less 



yellowish Otocoris alpestris strigata, adult female (p. 317) 



ff. Back striped with dusky (not black); under parts not yellowish. 



g. Upper parts heavily streaked, the broad dusky streaks equal to or 

 greater in extent than the slightly buffy grayish ground color. 

 h. Smaller (wing 88-97, averaging much less than 97); throat deeper 

 yellow and superciliary stripe yellowish. 

 i. Outer webs of greater wing-coverts and primary coverts grayish 

 brown or wood brown; wing 88-97, averaging 91.4. 



Otocoris alpestris insularis, adult female (p. 318) 

 ii. Outer webs of greater wing-coverts and primary coverts vina- 

 ceous-cinnamon; wing 92. 



Otocoris alpestris peregrina, adult female {\). 300) 

 hli. Larger (wing 94-102, averaging about 97); throat paler yellower 

 white; superciliary stripe dull white. 

 i. Sides of breast heavily streaked or spotted with dusky and flanks 

 heavily streaked. .Otocoris alpestris merrilli, adult female (p. 315) 

 ii. Sides of breast narrowly, if at all, streaked, and flanks nar- 

 rowly streaked . Otocoris alpestris praticola, tydult female (p. 311) < 

 gg. Upper parts more narrowly streaked, the dusky streaks much le.sis in 

 extent than the more decidedly buffy grayish groimd color. 

 h. Throat deeper yellow; sides and flanks more strongly brown or cin- 

 namomeous. 



