BIRDS OB^ NORTH AND MIDDLE AMERICA. 249 



(12.70): depth of l)ill at base, 5.84-7.11 (0.3.5); tarsus, 19.81-22.10 

 (21. OS); middle toe, 13.97-15.75 (14.99).^ 



Adalt female.— hength (skins), 134.62-139.70 (137.41); wing, 60.20- 

 64.01 (61.98); tail, 63.50-67.82 (65.53); exposed culmen, 11.43-12.70 

 (11.94); depth of bill at base, 5.59-6.35 (6.10); tarsus, ll». 81-20.57 

 (20.32); middle toe, 13.97-15.49 (14.73).- 



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 County).^ 



Peucxa ritficeps . . . var. boucardi (not Zonotridiia boumrdi Sclater) Hexshaw, 

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

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

 hal)its, etc. ). 



Peucira ntjiccps boucardi Allen, Bull. Nutt. Orn. Clul), v, Apr., 1880, 89 (s. Arizona 

 and 8." New Mexico) ; Auk, iv, 1887, 203 (crit. ) ; Bull. Am. :Mus. N. H., v, 1893, 



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

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

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

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

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

 ])reeding habits; descr. nest and eggs); iv, 1887, 203 (Santa Catalina Mts., 

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

 List, 1886, no. 580r/, part.— (?) Cooke, Bird Migr. Miss. Val., 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. New Mexico). 



P.\_eucsea'] ?'. [w/jcf/w] boucardi Coues, Key N. Am. Birds, 2d ed., 1884, 375. 



P. [cMca'a] rvficep>f boticardi 'RiT>oVi' w , INIan. N. Am. Birds, 1887, 429, part (Arizona; 



New Mexico; w. Texas) . 

 Peuciea boucardi Salvin and Godmax, Biol. Centr.-Am., Aves, i, 1886, 391, part 



(Arizona). 

 [Peucica r'uficepf^.] Subsp. /5. Peuava boucardi Sharpe, Cat. Birds Brit. Mus., xii, 



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

 Peucxa rvficeps scottii Sennett, Auk, v, Jan., 1888, 11,42 (Pinal Co., s. Arizona; 



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



398. 

 Aimophila ruficcps ficottii Ridgway, Auk, xvi, Jan., 1899, 81. — American Orni- 

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

 [Peuca'a ruftceps.} Subsp. a, Peucsea homochlamys Sh.\rpe, 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. 



