Carriker : List of the Birds of Costa Rica. 805 



"Costa Rican specimens were originally described as Call ispiza frantzii 

 by Cabanis in 1861, but were referred to the Ecuadorean C. icterocephala 

 by Dr. Sclater in 1868. Some of the adults in the present series are as 

 small as those from Ecuador, measured by Ridgway, and as there are no 

 observable differences in color, C. frantzii Cabanis cannot be recognized 

 even as a subspecies. 



"This fine series illustrates the plumage variation according to age to 

 good advantage. Birds in the juvenal plumage are as described by Ridg- 

 way, i. e., greenish with dark streaking above, including the crown; rump 

 more yellowish, beneath yellowish with no trace of the pale silvery greenish 

 of the adult. At the postjuvenal moult (August and September) this 

 latter character is assumed and the crown becomes rather dark yellow, 

 and the rump also becomes brighter yellow. In this plumage the bird 

 passes the first breeding season, at the close of which there is a complete 

 postnuptial moult, and the full adult plumage is assumed, in which the 

 yellow color of the crown and rump is much deeper and brighter than 

 before. Females seem to go through a corresponding cycle, but probably 

 never become so bright as the males." (W. E. C. Todd.) 



This species has a wide range, not only in Costa Rica, but elsewhere. 

 It is found over the whole of the highlands and both the Caribbean and 

 Pacific lowlands at certain seasons of the year (after the breeding season, 

 in August and September), when it descends from the higher slopes to 

 feed on fruit and berries ripening during that time. At this season it 

 is very abundant around Carrillo, and it is at this point that most speci- 

 mens of the species have been collected, not only by myself but by Under- 

 wood and others. 



691. Buthraupis caeruleigularis Cherrie. 



Buthraupis cceruleigularis Cherrie, Proc. U. S. Nat. Mus., XVI, 1893, 609 

 (Buena Vista, San Carlos River, Costa Rica [Castro and Fernandez]; coll. 

 U. S. Nat. Mus.). — Ridgway, Birds N. and Mid. Amer., II, 1902, 34 (Central 

 Costa Rica: Buena Vista). 



Bangs Collection: Carrillo, four specimens; Cariblanco de Sarapiqui, 



one c? (Underwood). 

 C. H. Lankester Collection: Cariblanco de Sarapiqui. 

 Carnegie Museum: Carrillo and La Hondura (Carriker). Seven skins. 



"This series, with others since taken by Mr. Ridgway and Mr. Under- 

 wood, amply justifies the specific distinctness of this bird, known here- 

 tofore only from the type. It is apparently the northern representative 



