BIRDS OF NORTH AND MIDDLE AMERICA. 249 



(12.70); depth of bill at base, 5.84-7.11 (6.35); tarsus, 19.81-22.10 

 (21.08); middle toe, 13.'.t7-15.75 (14.99).' 



Adult female.— L,ength (skins), 134.62-139.70 (137.41); wing, 60.20- 

 64.01 (6i.98); tail, 63.50-67.82 (65.63); exposed culmen, 11.43-12.70 

 (11.94); depth of bill at base, 5.59-6.35 (6.10); tarsus, 19.sl-20.57 

 (20.32); middle toe, 13.97-15.49 (14. TS).^ 



Northwestern portion of Mexican plateau, in States of Chihuahua 

 (Casas Grandes), Sonora, and Durango (Ciudad Durango, July), and 

 adjacent portions of Arizona, New Mexico, and western Texas (El 

 Paso Countj^).^ 



Peuaca ruficeps . . . var. boucardi (not Zonotrichin hmicardi Sclater) Hbnshaw, 

 Rep. Orn. Spec. Wheeler's Surv., 1874, 118 (Gila E., Camp Grant, etc., 

 Arizona; Bayard, New Mexico) ; Zool. Exp. ^X. 100th Merid., 1875, 289 (do. ; 

 habits, etc. ) . 



Peucsea riificejis hoiiciirdi Allen, Bull. Nutt. Orn. Club, v, Apr., 1880, 89 (s. Arizona 

 and s. New Mexico) ; Auk, iv, 1887, 203 (crit. ) ; Bull. Am. Mus. N. H., >■, 1893, 



39 (BavispeR., n. e. Sonora). — Ridgway, Nom. N. Am. Birds, 1881, no.230a. — 

 CouES, Check List, 2d ed., 1882, no. 256.— Brewster, Bull. Nutt. Orn. Club, 

 vii, 1882, 196 (Santa Rita Mts., etc., s. Arizona; Fort Bayard, New ilexico; 



■ habits, measurements, etc.). — Scott, Auk, ii, 1885, .354 .(Pima Co., Arizona, 

 in pine belt); iii, 1886, 83 (Santa Catahna Mts., Arizona, 4,000-10,000 ft.; 

 breeding habits; descr. nest and eggs); iv, 1887, 203 (Santa Catalina ilts., 

 Arizona, resident; song, etc.). — American Ornithologists' Union, Check 

 List, 1886, no. 580a., part.— (?) Cooke, Bird Jligr. Jliss. ^'al., 1888, 207 (Colo- 

 rado, Mitchell Co., Texas, May). — Merriam, North Am. Fauna, no. 3, 1890, 



40 (Grand Canon, alt. 4,000 ft. upward).— Anthony, Auk, ix, 1892, 366 

 (Apache, etc., s. w. Ncav Mexico). 



P.[euciea} r.lvfieeps] boucardi Coves, Key N. Am. Birds, 2d ed., 1884, 375. 



P. [euciea] ruficepa boucardi Ridgway, Man. N. Am. Birds, 1887, 429, part (Arizona; 



New Mexico; w. Texas) . 

 Peucsea boucardi Salvin and Godman, Biol. Centr.-Am., Aves, i, 1886, 391, part 



(Arizona). 

 \_Peucsea ruficeps.] Subsp. /S. Peucxa boucardi %ua^'pe, Cat. Birds Brit. Mus., xii, 



1886, 714, part (Catalina Mill, Arizona). 

 Peucsea ruficeps scottii Sennett, Auk, v, Jan., 1888, 41,42 (Pinal Co., S.Arizona; 



coll. G. B. Sennett and coll. Am. Mus. Nat. Hist.).— Chapman, Auk, v, 1888, 



398. 

 Aimophila ruficeps scottii Ridgway, Auk, xvi, Jan., 1899, 81. — American Orni- 

 thologists' LTnion Committee, Auk, xvi, 1899, 120. 

 [Peucsea ruficeps.] Subsp. a. Peucsea hoviochlamys Sharps, Cat. Birds Brit. Mus., 



xii, 1888, 713 (no type nor type locality designated; Santa Rita and Catalina 



Mts., Arizona). 



' Sixteen specimens. 

 ^ Six specimens. 



' Specimens from Presidio and Mitchell counties, Texas, are intermediate between 

 this form and A. r. eremceca. 



