BIRDS OF NORTH AND MIDDLE AMERICA. 



755 



CORAPIPO LEUCORRHOA ALTERA Hellmayr. 

 COSTA RICAN WHITE-THROATED MANAKIN. 



Similar to C. I. leucorrhoa,"' but wing-formula and size and shape of 

 outermost primary quite different, the seventh primary being long- 

 est (instead of fifth and sixth), the tenth (outermost) more than 25 

 mm. (instead of not more than 15 mm.) long and neither pointed nor 

 conspicuously narrowed. 



Adult male. — Above uniform gloss}' blue-black or dark steel blue, 

 the remiges and rectrices grayish black, edged (except primaries) 

 witli glossy blue-black or dark steel blue; chin, throat, malar region, 

 lower portion of suborbital region, and narrow edging to bend of wing, 

 pure white; rest of under parts uniform intense blue-black, more or 

 less gloss}'; maxilla grayish black, with paler tomia, mandible more 

 grajdsh; iris brown; legs and feet dusky horn color or blackish brown; 

 length (skins), 87-100 (92); wing, 56.5-61 (59.5); tail, 28.5-32 (30.7); 

 exposed culmen, 8.5-9.5 (8.8); tarsus, 15-17 (15.9); middle toe, 9-10 

 (9.4)." 



Adult female. — Above plain olive-green; chin and throat varying 

 from light grayish olive-green to nearly pure gray; chest, sides, and 

 flanks lighter olive-green than upper parts, fading into sulphur 

 yellow or pale olive-greenish yellow on abdomen and under tail- 

 coverts; axillars and under wing-coverts pale gray tinged with pale 

 yellowish olive-green; inner webs of remiges deep brownish gray, 

 paler on edges; bill, iris, and feet as in adult male; length (skins), 

 87-96 (93); wing, 55-61 (57.5); tail, 27-31 (29.4); exposed culmen, 

 8.5-10 (9.2); tarsus, 15-16.5 (15.8); middle toe, 9-10 (9.4).« 



Young male. — At first similar to adult females, but when older the 

 white throat-area (which starts laterally) is developed before the black 

 begins to appear. 



Panama (Chitra; Calovevora; Santa Fe de Veragua; Divala; Vol- 

 can deChiriqui, 5,000 feet; Boquete, 4,000 feet ; Bugaba; Laguna de 

 Castillo), Costa Rica (Angostura; Turrialba; Tucurriqui; Cervantes; 

 Naranjo; Carrillo; Guapiles; Guaitil; Barranca; Bonilla; La Cande- 

 laria; Jimenez; Buena Vista; La Concepcion), and eastern Nicaragua 

 (Chontales) . 



« See p. 754. 



^ Ten specimens from Costa Rica. 



