BIRDS OF NORTH AND MIDDLE AMERICA. 123 



c. Lower back and rump yellow. (Central Nicaragua to central Costa Rica.) 



Lanio leucothorax, adult male (p. 124) 

 cc. Lower back and rump l)lack. (Veragua, Chiri(|ui, and southwestern Costa 



Rica. ) Lanio melanopygius, adult male (p. 125) 



aa. Back, wings, and tail brown; head bnjwn or grayish, much paler on throat; 



under parts of body dingy yellow. 



h. Throat light gray; flanks yellow, tinged with olive-brown; under tail-coverts 



yellow or dull orange; rump yellowish.. Lanio aurantius, adult female (p. 123) 



hh. Throat light brown or grayish brown; flanks and under tail-coverts tawny or 



yellowish cinnamon; rump not yellowish. 



c. More russet-brown above, the head undter brown, and throat wood brown, or 



Isabella color Lanio leucothorax, adult female ( p. 1 24) 



cc. More olive-brown al)ove, the head olive, and throat grayish l)rown or brown- 

 ish gray Lanio melanopygius, adult female (p. 125) 



LANIO AURANTIUS Lafresnaye. 

 MEXICAN SHRIKE-TANAGER. 



Adult male. — Head, neck (except lower foreneck), scapulars, wings 

 (except part of lesser and middle coverts), tail, and thighs uniform 

 black; inner portion of lesser wing-covert area and innermost middle 

 coverts (except tips) white; back, rump, and under parts of body yel- 

 low (grading from cadmium 3^ellow on back to canary yellow on pos- 

 terior under parts); lower foreneck tawny, the chest more or less 

 tinged with the same; under wing-coverts white, with broad black 

 external border; upper tail-coverts black, the shorter ones yellow with 

 black central areas; bill black; legs and feet dusky; length (skins), 

 179.1-205.7 (190.8); wing, 101:.-1-106.7 (105.1); tail, 89.2-96.5 (93); 

 exposed culmen, 18-20.6 (19.6); depth of bill at base, 8.6-10.2 (9.1); 

 tarsus, 19.3-20.6 (20.1) middle toe, 14-16 (15.2).' 



Adult f finale. — Pileum and hindneck dark olive, usually more or 

 less tinged with slate-gray, especiall}^ on forehead; back and scapulars 

 olive-brown, the lower back lighter and more tawny, or ochraceous- 

 olive, this passing into olive-ochraceous or dull gallstone-yellow on 

 rump; wings and tail plain brown (intermediate between raw umber 

 and mars brown); sides of head similar to pileum but not quite so dark 

 and rather grayer, passing into smoke gray on chin, throat, and fore- 

 neck; under parts of body lemon yellow, shaded with olive on chest, 

 sides, and flanks; the latter slightly more fulvous; under tail-coverts 

 fulvous-3^ellow or ochraceous-orange; maxilla blackish, mandible paler, 

 more horn color; legs and feet horn brownish (in dried skins); length 

 (skins), 175.3-196.9 (183.9); wing, 91-99.6 (97); tail, 79.8-91.2 (85.6); 

 exposed culmen, 17.5-19.3 (18.5); depth of bill at base, 8.9-9.7 (9.1); 

 tarsus, 18.8-19.8 (19.3); middle toe, 13.5-11.2 (11).' 



Southeastern Mexico, in States of Vera Cruz (Orizaba, Santecoma- 

 pan, etc.), Oaxaca(Guichicovi), and Tabasco (Teapa), Guatemala (Coban,. 

 Chisec, Choctum, Kampamak, Kamkhal, etc.), British Honduras 

 (Belize), and Honduras. 



^ Seven specimens. ''■ Five specimens. 



