SEPT., 1910. BIRDS FROM COSTA RICA FERRY. 263 



Prionornis platyrhynchus minor Hart. 

 i specimen. Guayabo 9 . 



Trochilidse 



Heliothrix barroti (Bourc. & Muls.). 



1 specimen. Guayabo d\ Several of these strikingly colored birds 

 were seen, but they were not common. 



Hemistephania veraguensis (Salv.}. 



2 specimens. Coliblanco 2 9 . 



Thalurania columbica venusta (Gould). 



ii specimens. Guayabo gcT, 2 9 . 



Very common about stubs grown with flowering vines. Dissec- 

 tion showed birds were breeding or about to breed. 



Elvira nigriventris (Lawr.}. 

 i specimen. Coliblanco cT. 



Eupherusa egregia Scl. & Salv. 



3 specimens. Coliblanco id 1 , 2 sex?. 



Panterpe insignis Cab. & Heine. 



14 specimens. Vol. Turrialba gcJ 1 , 4 9 , i sex?. 



This humming-bird was one of the characteristic birds of the 

 forest growing at the base of the Ash-cone. The abundance of 

 flower-bearing trees and vines made the open forest about the le- 

 cheria an ideal humming-bird locality. The males were constantly 

 engaged in combat, performing some amazing antics while on the 

 wing. This species was breeding at this season. A fully formed yolk 

 was found in one female, while two others showed ovaries at the 

 height of activity. This species was noticeable for the frequency 

 with which it resorted to perching and the length of time it spent in 

 this position. 



Amazilis tzacatl (Llave). 



14 specimens. Guayabo, iod\ 2 9 ; Fort Limon, i 9 , i sex?. 



A male taken at Guayabo on January 30 had testes in a state of 

 activity, and a female taken at the same place on January 27 showed 

 active ovaries. 



