Yol i907 IV ] Bangs, Birds from Western Costa Rica. 301 



Characters. Similar to true Leptopogon pileatus Cabanis of Guate- 

 mala and southern Mexico, and of about the same size, but back paler 

 green; under parts much paler, especially the belly which is primrose 

 yellow; lining of wing and wing bands paler and much yellower, less 

 fulvous; margins of rectrices and upper tail-coverts much greener, less 

 reddish olive. 



The new form is much nearer to C. superciliaris than true C. pileatus 

 in general coloration, except for the brown instead of gray cap. 



Remarks. C. pileatus faustus is a well marked southern form of which 

 the five skins before me vary but little in color among themselves, all 

 differing from northern specimens in their paler colors and light yellow 

 bellies. 



The type locality of the species is Guatemala; one skin in my collection 

 from that country (Gualan, Guatemala) agrees much better with examples 

 from Vera Cruz, Mexico, than with the Costa Rican series. It, however, 

 approaches slightly the southern form in some respects, and I judge the 

 extreme characters of the northern form are only attained in the very 

 northern part of its range — southern Mexico. 



Myiopagis placens accola Bangs. Three adults, one male, two females, 

 Boruca, April, May and June. 



Camptostoma pusilla flaviventre (Scl. & Salv.). Two adults, male and 

 female, Paso Real and Pozo del Rio Grande, July and August. 



Tyranniscus parvus Lawr. Forty-three specimens, young and adults 

 of both sexes, Boruca, Paso Real and Pozo del Rio Grande, April-August. 



Elainea flavogastra subpagana (Scl. & Salv.). Twenty-six specimens, 

 adults and young of both sexes, Boruca, Paso Real and Lagato, April-July. 



Elainea chiriquensis Lawr. Twelve specimens, adults and young of 

 both sexes, Boruca, Paso Real and Lagato, April-July. 



This appears to be the first time this species has been recorded from 

 Costa Rica, though the type came from near by in Chiriqui. 



Mr. Ridgway has kindly informed me that the species must be known 

 by Lawrence's name though both Sclater and Allen synonymize E. chiri- 

 quensis with E. flavogastra subpagana; they however, were clearly wrong. 



Lawrence's type, in the U. S. National Museum, agrees entirely with 

 the present Costa Rican series and also with Panama birds, upon which 

 I based my Elainea sordidata (the type of the latter was from the Pearl 



