582 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ix, 1858, 368; Oat. JST. Am. Birds, 1859, no. 272; Review Am. Birds, 1864, 

 141.— Vekeill, Proc. Essex Inst., iii, 1862, 149 (Oxford Co., Maine).— Law- 

 EENCE, Ann. Lye. N. Y., viii, 1866, 283 (near New York Oity).— Coues, Proc. 

 Essex Inst., v, 1868, 278.— Turnbull, Birds E. Penn. and N. J., 1869, 27; 

 Phila. ed., p. 20. 



Troglodytes americana BiiEWEs., Journ. Bost. SocN. H., 1837, 437. 



Traglodytes americarms Thompson, Nat. Hist. Vermont, 1853, 85. 



Hylemaihrous americanus Oabanis, Journ. fiir Orn., 1860, 407. 



T[roglodyUs\ sylvestris (not of Gambel) Oabanis, Mus. Hein., i, 1850, 78. 



TROGLODYTES AEDON PARKMANII (Audubon). 

 WESTERN HOUSE WKEN. 



Similar to T. a. aSdon, but decidedly paler and grayer, with back and 

 scapulars usually distinctly barred with dusky (very rarely with bars 

 obsolescent), and size averaging slightly larger. 



Adult male.— IjQngih (skins), 98-130(113)'; wing, 49.5-55.6 (52.6); 

 tail, 38-50 (44.8); exposed culmen, 11.5-14 (13); tarsus, 15.5-18 (17.2); 

 middle toe, 11-13.5 (12)." 



Adult feiimle.—LiQngth (skins), 98-120 (111); wing, 48-54 (51); tail, 

 39.5-47 (44.2); exposed culmen, 11-13 (12.7); tarsus, 16-18.5 (17.2); 

 middle toe, 10-13 (11.7).* 



"Forty-three specimens. 

 ^Twenty-seven specimens. 



Specimens from different geographic areas compare in average measurements as 

 follows: 



Locality. 



Wing. 



Ex- 

 posed 

 culmen. 



Tarsus. 



Middle 

 toe. 



MALES. 



Ten adult males from Pacific coast north of San Diego 

 County 



Nine adult males from San Diego County, California 



Ten adult males from Rocky Mountains (Arizona to Mon- 

 tana) , 



Eight adult males from Texas 



Six adult males from Mississippi Valley , 



Four adult males from Mexico 



FEMALES. 



Eight adult females from Pacific coast north of San Diego 

 County 



Five adult females from San Diego County, California 



Seven adult females from Rocky Mountain district 



Four adult females from Mississippi Valley 



Three adult females from Mexico 



52.6 

 62.9 



53.1 

 51.6 

 62. G 

 62.4 



60 



53 



51.2 



60.7 



60.2 



46.6 

 45.7 



44.8 

 41.4 

 42,6 

 45.2 



45.7 



45.7 



44.8 



41 



40.2 



13 

 13.3 



13 

 12.5 

 13.2 

 13 



12.2 



12.8 



12.6 



12 



12.3 



16.9 

 17.2 



17 

 16.9 

 18 

 18 



16.9 

 17.6 

 17.3 

 17.2 

 17.2 



11.9 

 11.8 



12.2 

 12.2 

 12.1 

 12 



12.1 

 11.9 

 11.8 

 12.7 

 12.3 



With a very large series (more than 250 specimens) for comparison I am unable to 

 appreciate even the most minute average difference between specimens from the 

 Pacific coast district and those from the interior (as far eastward as the eastern bor- 

 der of the prairie districts of the Mississippi Valley), and consequently can find no 

 reason for recognizing two forms. 



