BIRDS OF NORTH AND MIDDLE AMERICA. 



603 



form of spots rather than bars) ; under tail-coverts clear rusty brown 

 or russet barred with black and tipped with white or with sagittate 

 subterminal marks of white; maxilla blackish or dusky brown with 

 paler tomia; mandible lighter brown; iris brown; legs and feet 

 brownish. 



Young. — Essentially like adults, but brown of upper parts more 

 rufescent, flanks and under tail-coverts less distinctly barred (bars 

 sometimes obsolete), and feathers of under parts more or less dis- 

 tinctly margined with brown or dusky. 



Adult mafe.— Length (skins), 102-114: (110); wing, 50-54 (51.7); 

 tail, 33-35 (34.1); exposed culmen, 13-15 (14); tarsus, 17-21 (19.5); 

 middle toe, 13-15 (14. 2). « 



Adult female.— Length (skins), 99-113 (106); wing, 48.5-51.5 (50); 

 tail, 31.5-33 (32.5); exposed culmen, 13-15 (14.2); tarsus, 18.5-20 

 (19.2); middle toe, 12.5-15 (13.7).'' 



St. George Island, Prybilof group, easternmost Aleutian islands 

 (Unalaska; Akutan;" Unga;" Amaknak"), and part of Alaska penin- 

 sula (Belkof ski '). 



Troglodytes alascensia Baikd, Trans. Chicago Ac. Sci., i, 1869, 315, pi. 30, fig. 3 

 (St. George Island, Prybilof group, Alaska; coll. U. 8. Nat. Mus. ). — Dall 

 and Bannister, Trans. Chicago Ac. Sci., i, 1869, 280 (St. George I.). — 

 Baird, Brewer, and Eidgway, Hist. N. Am. Birds, i, 1874, pi. 9, fig. 8. — 

 Stejnegbk, Zeitschr. ges. Orn., i, 1884, 11, part (monogr.). — American Orni- 

 thologists' Union, Check List, 1886, no. 723, part. — Turner, Contr. Nat. Hist. 

 Alaska, 1886, 181, part, pi. 9, upper fig. (Unalaska; Unga I. ; Alaska penin- 

 sula at Belkofski).— Nelson, Rep. Nat. Hist. Coll. Alaska, 1887, 210 (St. 

 George I.; Akutan; Unalaska; habits). — Eidqway, Proc. U. S. Nat. Mus., 

 xvi, 1893, 665 (Unalaska). 



T[roglodytes^ alascensis Eidgway, Man. N. Am. Birds, 1887, 555, part. 



lAnorthura] alascensis Coues, Key N. Am. Birds, 1872, 87. 



Anorthura alascensis Coues, Birds Col. Val., 1878, 178, in text. — Eidgway, Proc. 

 U. S. Nat. Mus., iii, 1880, 170, 215, part; Norn. N. Am. Birds, 1881, no. 66, 

 part. — Shakpe, Cat. Birds Brit. Mus., vi, 1881, 273 (Amaknak I., near Una- 



« Nine specimens. 

 6 Six specimens. 



Specimens from St. George Island compare in measurements with those from 

 Unalaska as follows: 



" Specimens from these localities not seen by me. 



