Ridgway New Forms of Oligomyodian Birds. 119 



longs to the southern form known as A. sclateri Lawrence, the latter name 

 being a synomym of A. citreopyga. 



Attila citreopyga luteola subsp. nov. 



Type, No. 64,623, U. S. Nat. Mas., adult male, San Jose, Costa Kica ; Jose 

 C. Zeledon. (Collector's No. 247.) 



Similar to A. citreopyga cinnamomea, of western Mexico, but decidedly 

 smaller, rump and upper tail-coverts yellow instead of ochraceous, and an 

 terior under parts much less distinctly streaked. Differing from A. c. 

 citreopyga in much lighter and morecinnamomeous color of back, scapulars, 

 and tail and much less distinctly streaked throat and chest. 



Pacific slope of Costa Rica and Nicaragua. 



Tityra semifasciata columbiana subsp. nov. 



Type, No. 170,410, U. S. Nat. Mus., adult female, La Concepcion, Santa 

 Marta, Colombia, April 6, 1899; W. W. Brown, Jr. 



Similar to T. semifasciata semifasciata but adult male with forehead much 

 less extensively black, and adult female much darker above, with back and 

 scapulars light grayish brown (instead of brownish gray to pure gray) and 

 pileum deep grayish brown (instead of light grayish brown or brownish 

 gray). 



Northern Colombia (Santa Marta district). 



Tityra semifasciata costaricensis subsp. nov. 



Type, No. 199,039, U. S. Nat. Mus., adult female, Bonilla, Costa Rica 

 (Atlantic slope), March 29, 1905; Anastasio Alfaro. 



Similar to T. s. columbiana (the adult male scarcely if at all distinguishable) 

 but usually with black area on inner web of lateral rectrices more exten 

 sive; adult female much darker and browner, the back and scapulars deep 

 grayish brown, pileum and auricular region darker grayish brown, and 

 rump darker gray ; slightly smaller (Panama specimens decidedly so). 



Panama to southern Honduras (Rio Segovia). 



Although Dr. Sclater and Messrs. Sclater and Salvin profess their in 

 ability to distinguish the birds of this species from Mexico and Central 

 America from those of South America, and consequently 'unite them all 

 under the name Tityra semifasciata, examination of a splendid series 

 (several hundred specimens) shows clearly that in reality the species is 

 easily divisible into several well-defined geographic forms, of which I am 

 able to characterize the following : 



1. Tityra semifasciata semifasciata (Spix). Southern Brazil, etc., to central 

 Colombia (Bogota). 



2. Tityra semifasciata columbiana Ridgway. Northern Colombia (Santa 

 Marta district). 



3. Tilyra semifasciata costaricensis Ridgway. Panama to southern Hon 

 duras. (Panama specimens are intermediate in coloration between the 

 typical bird from Costa Rica, Nicaragua, and southern Honduras on the 

 one hand and Santa Marta examples (T. s. columbiana) on the other, but 

 are decidedly smaller than the latter and on the whole nearer the former 

 in coloration). 



