BIRDS OF NORTH AND MIDDLE AMERICA. 725 



POLIOPTILA ALBILORIS Sclater and Salvin. 



WHITE-LORED GNATOATCHER. 



t 



Adult male. — Pileum, together with upper half (more or less) of 

 auricular region, uniform glossy blue-black; whole loral region, eye- 

 lids, a small spot or short streak above posterior angle of eye, sub- 

 orbital and malar regions and lower portion of auricular region, 

 together with under parts, white, passing into pale bluish gray on 

 sides and flanks, the chest faintly shaded with the same; hindneck, 

 back, scapulars, rump, and wing-coverts, uniform bluish gray (between 

 plumbeous and slate-gray) ; remiges dull or brownish slate color edged 

 with, pale gray, the tertials very broadly and conspicuously edged with 

 white; upper tail-coverts and tail black, the outermost rectrix with 

 outer web white, except extreme base, the inner web with about 

 terminal two-thirds white, the next with nearly as much white on 

 outer web but only about terminal half of inner web white, the third 

 with tip white for about 10 to 15 mm., the fourth often with a distinct 

 white tip; maxilla black, the mandible grayish with dusky tip; iris 

 brown; legs and feet dusky in dried skins, plumbeous in life;" length 

 (skins), 105-115 (110.2); wing, 48-61 (49); tail, 49-56 (52.6); exposed 

 culmen, 11.5-12 (11.6); tarsus, 17.5-18 (17.7); middle toe, 9-9.5 (9.4).* 



Adult female. — Similar to the adult male, but back of head replaced 

 by slate color, and gray of back, etc. , duller (slate-gray) ; length (skins), 

 102-106 (103.7); wing, 44-47 (45.6); tail, 47.5^9 (48); exposed cul- 

 men, 11-12 (11.2); tarsus, 17-18 (17.2); middle toe, 9." 



Guatemala (Chuacus) to Oaxaca (Santa Efigenia; Tehuantepec; Cui- 

 cuitlan; Huilotepec; Tapana). 



PolioptUa alKLoria BchATER and Salvin, Proc. Zool. Soc. Lond., 1860, 298 (Nota- 

 gua Valley, Guatemala; coll. Salvin and Godman); Ibis, 1860, 397 (do.); 

 Norn. Av. Neotr., 1873, 4.— Owen, Ibis, 1861, 61, pi. 2, fig. 3, egg (Choacus, 

 Guatemala; descr. nest and eggs). — Baikd, Review Am. Birds, 1864, 70, part 

 (in synonymy). — Lawrence, Bull. U. S. Nat. Mus., no. 4, 1876, 12 (Santa 

 Efigenia and Tehuantepec, Oaxaca). — Salvin and Godman, Biol. Centr.- 

 Am., Aves, i, 1879, 53, part, pi. 5, figs. 1, 2 (Chuacus, Guatemala; Santa 

 Efigenia and Tehuantepec, Oaxaca). — Sharpe, Cat. Birds Brit. Mus., x, 1885, 

 454 (Tehuantepec, Mexico; Chuacus, Guatemala; La Union, Salvador). 



[Polioptila] albiloris Gray, Hand-list, i, 1869, 237, no. 3440. — Sclater and Sal- 

 vin, Nom. Av. Neotr., 1873, 4. 



P\_oUoptila] albiloris Bidgway, Proc. V. S. Nat. Mus., v, 1882, 387, 388, 389, part 

 (Santa Efigenia and Tehuantepec, Oaxaca; Guatemala) ; Man. N. Am. Birds, 

 1887, 569, part (Tehuantepec; Guatemala; Salvador?). — Hellmaye, Novit. 

 Zool., vii, 1900, 536, in text, part (crit.); Tierreich, 18 Lief., 1903, 28. 



« According to Sumichrast. " Four specimens. 



6 Four specimens, from Oaxaca. 



