BIHDS 01' NOKTH AND MIDDLE AMERICA. S99 



lateral pairs broadlj' tipped with- dull whitish; bill black, the ba-sal 

 portion of mandible bluish; legs and feet (in dried skins), dusk}' horn 

 color. 



Adult nude in winter. — Similar to the summer male, but plumage 

 softer and white edgings on wings broader. 



Adiolt female in swnmer. — Above light yellowish olive, becoming 

 more yellowish on pileum, where inclining to orange-yellow on fore- 

 head and superciliary region, the back usually with a few narrow 

 streaks of dusky; lores, anterior portion of malar region, chin, and 

 throat black; sides of head and under parts (except as described) yel- 

 low, more orange-yellow anteriorly, the sides and flanks slightly tinged 

 with olive; wings as in the male but ground color dusky instead of 

 black and the white edgings tinged with gray. 



Adult female in winter. — Similar to the summer female, but plumage 

 softer and whitish wing-edgings broader. 



Adult maZe.— Length (skins), 203.2-226.1 (211.8); wing, 102.9-105.4 

 (104.1); tail, 90.2-94 (91.9); exposed culmen, 24.9-26.7 (25.7); depth 

 of bill at base, 12.7-13; tarsus, 25.9-26.7 (26.4); middle toe, 17.8-18.3 



(18)/ 



Adult femule.— Length (skins), 193-203.2 (197.9); wing; 94-99.1 

 (96.8); tail, 83.3-87.1 (85.6); exposed culmen, 22.9-24.9 (24.4); depth 

 of bill at base, 10.9-12.7 (11.9); tarsus, 25.4-25.9 (25.4); middle toe, 

 17-17.8 (17.3).' 



Tres Marias Islands (islands of Maria Madre and Maria Cleofa), 

 western Mexico. 



Icterus graysonii Cassin, Proc. Ac. Nat. Sci. Phila., xix, Apr., 1867, 48 (Tres 



Marias Islands, w. Mexico; coll. U. S. Nat. Mus.). 

 Icterus graysoni Finsch, Abh. Nat. Ver. Bremen, 1870, 336 (Tres Marias; full 

 descriptions).— Grayson, Proc. Best. Soc. N. H.,xiv,1871, 280 (habits, etc. ).— 

 Lawrence, Mem. Bost. Soc. N. H., ii, 1874, 280.— Sclater, Ibis, 1883, 374 

 (monogr.); Cat. Birds Brit. Mus., xi, 1886, 387.— Salvin and Godman, 

 Biol. Centr.-Am., Aves, i, 1887, 478.— Nelson, North Am. Fauna, no. 14, 

 1898, 50 (habits; notes; descr. nest and eggs). 

 llcterus'] grayscmi Sclater and Salvin, Nom. Av. Neotr., 1873, 36. 



ICTERUS AURATUS Bonaparte. 

 ORANGE ORIOLE. 



Similar to I. cueullatus igneus, but whole back orange or orange- 

 yellow (sometimes streaked with black in female), lesser wing-coverts 

 orange, and primaries broadly edged with white basally. 



Adult male. — Lores, eyelids, anterior half of cheeks (back to about 

 middle of eye), chin, and whole throat black; scapulars black, some- 

 what intermixed with orange or orange-yellow next to interscapular 

 region; greater -wing-coverts and remiges black, more or less edged 



' Five specimens. 



