552 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ing- to sides of neck, the posterior portion margined above by a narrow 

 line of black; a broad postocular stripe of brown occupying upper 

 half (approximately) of auricular region; suborbital region and lower 

 part of auricular region white, the latter narrowl}' streaked Avith 

 dusky, the former sometimes with narrow dusky margins to the 

 feathers; sides of neck brown, indistinctly streaked with white, some- 

 times with black also; under parts white, passing into buffy grayish 

 brown on sides and flanks, the latter deeper (inclining more or less to 

 Isabella color or wood brown) and sometimes indistinctly barred with 

 darker; under tail-coverts white, broadly barred with black; maxilla 

 blackish brown with paler tomia; mandible paler, becoming whitish 

 basally; legs and feet deep horn brown. 



Adult ?wa7d.— Length (skins), 122.5-138 (130.7); wing, 51-59 (57.2); 

 tail, 11.5-55.5 (19.2); exposed culmen, 18-19 (18.7); tarsus, 20-22.5 

 (21); middle toe, 12.5-15.5 (13.8).« 



Adult female.— Ijength (skins), 119.5-126 (123.2); wing, 53.5-58 

 (55.7); tail, 42-47 (44.9); exposed culmen, 17.5-19.5 (18.1); tarsus, 

 19-21.5 (20.4); middle toe, 13-14.5 (13.7).^ 



Yucatan (Yalahao; Merida; Chichen-Itza; Puerto Morelos; La Vega) 

 and adjacent portion of Guatemala (Sakluk, near Peten).'' 



Troglodi/tes alh'mucha Cabot, Proc. Bost. Soc. N. H., ii, 1847, 258 (Yalahao, 



Yucatan; coll. Dr. S. Cabot) .—Baird, Review Am. Birds, 1864, ]23. 

 Thryothorus albhuicha Baikd, Review Ain. Birds, Oct., 1864, 149 (crit. ). — Salvin, 

 Ibis, 1866, 191 (crit.); 1874, 326 (crit.).— Lawrence, Ann. Lye. N. Y., ix, 

 1869, 199 (Merida, Yucatan).— Salvin and Godman, Biol. Centr.-Am., Aves, 

 i, 1880, 94, pi. 7, fig. 2.— Sharpe, Cat. Birds Brit. Mus., vi, 1881, 224.— Chap- 

 man, Bull. Am. Mus. N. H., viii, 1896, 276 (Chichen-Itza, Yucatan). 

 \_Thryothorus] albinucha Sclater and Salvin, Nom. Av. Neotr., 1873, 7. 

 T[hryothorus'] albimicha Ridgway, Man. N. Am. Birds, 1887, 550. 

 (?) Thryothorus jieteniciis 8 A-Lxis, Proc. Zool. Soc. Lond., 1863, 187 (Sakluk, near 

 Peten, Guatemala; coll. Salvin and Godman). — Baird, Review Am. Birds, 

 1864, 125 (Sakluk). 

 (?) [Troglodytes'] j)etenicns Gray, Hand-list, i, 1869, 189, No. 2572. 



THRYOMANES BEWICKII BEWICKII (Audubon). 

 BEWICK'S WREN. 



Adults in ajpring and summer. — Pileum, hindneck, back, scapulars, 

 and smaller wing-coverts plain brown (between prouts brown and 

 light l)istre or broccoli brown, nearest to the first named), the rump 

 more chestnut-brown, with concealed roundish spots of white, the 

 feathers blackish slate basally; secondaries and greater wing-coverts 



« Six specimens. 



& Four specimens. 



c There is a possibility that the Guatemalan bird may be separable from that of 

 Yucatan. Professor Baird compared the type of T. peteyncus with that of 2\ albinucha 

 (from Yalahao, Yucatan) and noted certain differences, which may or may not prove 

 constant. (See Review of American Birds, 1864, 149.) 



