300 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



with white, especially the middle .secondaries and longer primaries, 

 the latter broadlj' edged with white basally (the white occupying full 

 width of outer web at base of the primaries); middle wing-coverts 

 white, producing a broad band; tail black, the lateral rectrices more or 

 less broadly margined at tips with light grayish ; rest of plumage, 

 including lesser wing-coverts, rich cadmium orange or orange-yellow, 

 most intense on head, neck, and chest; bill black, with basal portion 

 of mandible bluish gray (pale grayish blue or bluish white in life?); 

 legs and feet grayish dusky (bluish gray in life?); length (skins), 

 184.2-209.6(192.5); wing, 88.6-94.7 (91.9); tail, 81.6-91.9 (89.4); cul- 

 men, from base, 19.8-22.1 (20.8); depth of bill at base (one specimen), 

 8.6; tarsus, 23.9-25.1 (24.4); middle toe, 15.7-17 (16.3).' 



Adult female. — Similar to the adult male, and perhaps not always 

 distinguishable, but usually (?) slightly duller in color, especially on 

 the back, which is more or less tinged with olive and sometimes 

 marked with a "few black streaks; lesser and middle wing-coverts 

 partly black; length (skins), 191.8-203.2 (197.6); wing, 87.4-93.2 

 (91.2); tail, 86.6-91.2 (88.1); culmen, from base, 20.3-20.8 (20.6); 

 depth of bill at base (one specimen), 8.4; tarsus, 24.6-24.9 (24.9); mid- 

 dle toe, 15.2-16.8 (16.3).^ 



Yucatan (Merida; Tekanto; Chichen Itza; Temax; El Campo), 

 including outlying island of Meco. 



Id [ents] auralus Bonaparte, Oonsp. Av., i, June 20, 1850, 435 (Yucatan; coll. 

 Brussels Mus. ; ex Du Bus, manuscript) . 



/(■term aurahis Cassin, Proc. Ac. Nat. Sci. Phila., 1867, 50 ("Mexico"; monogr.).— 

 Lawrence, Ann. Lye. N. Y., ix, 1869, 271 (Merida, n. Yucatan; crit.).— 

 BoucAED, Proc. Zool. Soc. Lond., 1883, 445.— Sclater, Ibis, 1883, 369 

 (monogr.); Cat. Birds Brit. Mus., xi, 1886, 382 (n. Yucatan). — Salvin and 

 GoDMAN, Biol. Centr.-Am., Aves, i, 1887, 473, pi. 33, fig. 2. — Salvin, Ibis, 

 1888, 264 (Meco I., coast of Yucatan; crit.).— Stone, Proc. Ac. Nat. Sci. 

 Phila., 1890, 208 (Tekanto, Yucatan).— Chapman, Bull. Am. Mus., N. H., 

 viii, 1896, 281 (Chichen Itza, Yucatan). 



ICTERUS XANTHORNUS XANTHORNUS (Gmelin). 

 YELLOW ORIOLE, 



Admits (sexes alike). — Lores, eyelids, anterior margin of malar region, 

 chin, throat, and median portion of upper chest black; greater wing- 

 coverts, remiges, and rectrices black, the first tipped with white, pro- 

 ducing a distinct band, the tertials broadly edged with white (except 

 toward base of second and third), the remaining remiges narrowly 

 edged with white toward tips, the longer (second to fifth) primaries 



'Seven specimens, but lew of them with sex actually determined. 

 ^ Three supposed females, none of them being sexed. 



