GEOTHLYPIS. 525 



p. Bill stouter and tarsus shorter. Adult male with hinder 

 border to black musk usually more or less tinged with 

 pale yellow laterally", and occiput dull olive-green like 

 back; wing 2.30-2.55 (2.42), tail 2.25-2.55 (2.42), ox- 

 posed culmen .60-.G3 (.62), tarsus .81-.85 (.84). Hab. 

 Island of Abaco, Bahamas. 



G. tanneri Ridqw. Abaco Yellow-throat.' 

 e'. Black mask of adult male bordered behind by yellow (much 

 as in G. heldingi) ; upper parts very vivid olive-green ; lower 

 parts verj^ rich gamboge-yellow, including anal region and 

 flanks, the latter, however, tinged with olive-green. Adult 

 female with forehead and superciliarj^ region olive-yellow- 

 ish, or yellowish olive-green, and lower parts wholly bright 

 yellow. "Wing 2.40-2.60 (2.47), tail 2.45, exposed culmen 

 .61-.62, tarsus .81-.88 (.85). Hab. Eleuthera Island, Ba- 

 hamas. G. coryi RiDGW. Cory's Yellow-throat.' 

 c'. Bill extremely slender and acute ; black mask of adult male extending 

 over crown, and without any lighter posterior border; legs and feet 

 dark brown or blackish. 



Adult male : Above deep olive, or olive-brown, with whole top and 

 sides of head, including malar region, black ; lower parts oil- 

 yellow or saffron, inclining to gamboge on throat, and much 

 tinged with brown on sides and flanks. Immature male (or 

 adult male in winter ?) similar, but with top of head dull olive, 

 the lores, ear-coverts, and malar region dull black. Adult fe- 

 male: Similar to male, but without any black on head. Length 

 (skin) about 4.80-5.00, wing 2.25-2.35, tail 2.20-2.25, tarsus .80- 

 .85. Hab. Southeastern Mexico (Orizaba, etc.). 



G. speciosa Scl. Orizaba Yellow-throat.' 

 fl'. Bill very stout, decidedly deeper than broad, its greatest depth much more than 

 half its length from nostril, the culmen strongly curved. (Subgenus Chamce- 

 thlypis RiDGW.*) 



Adult males plain olive-green above, becoming gray on top of head (some- 

 times on nape also) ; lores (sometimes also space surrounding e^-e) 

 black; lower parts gamboge-yellow, sometimes becoming buffy whitish 

 on lower belly and flanks. Adult females similar to males, but lackin>T 

 gray and black of head, and yellow of lower parts paler. 

 6'. Eyelids white. 



c'. Bill smaller; belly and anal region bufTj- whitish, the sides and flanks 

 pale grayish buff; adult male with top of head bluish gray; wing 

 2.10-2.25, tail 2.40-2.50 (feathers much worn at tips), exposed cul- 



• Geothli/pin Innnrri RiDOW., Auk, iii. .Tuly, 18,S6, 335. 

 » Geoihli/pit coryr Rmow., Auk, iii. July, 1886, 334. 



> neothlgpi, ipecwia Scl., P. Z. S. 185.'?, 447. 



* New subgenus. Tjfe, Geolhlt/pii polwcephala Baird. 



