262 FIELD MUSEUM OF NATURAL HISTORY ORNITHOLOGY, VOL. I. 



These birds are abundant in the lowlands of Costa Rica, becoming 

 scarcer at higher altitudes. At Guayabo they were abundant, but 

 only 3 or 4 were seen at Coliblanco. 



P&ittacidse. 



Conurus finschi Salv. 



1 specimen. Guayabo cT. Screaming flocks of these were' of 

 frequent occurrence. This specimen has no sign of red on the head, 

 but it has the red under wing-coverts of finschi. 



Amazona salvini (Salv ad.}. 



2 specimens. Guayabo i d\ i 9 . When these specimens are com- 

 pared with a series they show themselves brighter and lighter colored, 

 with the under side of the tail bright grass green. The other specimens 

 have tails strongly tinged with golden yellow. 



This handsome species was abundant about Guayabo, flying about 

 and feeding in large flocks. In some cases, however, the birds were 

 seen going in pairs. As commonly true among parrots when mated, 

 each individual of a pair shows great devotion to the other, refusing 

 to leave the site where its mate has been killed. These birds were 

 very shy, and often eluded the collector by keeping perfectly quiet 

 while hidden in the foliage. 



Pionus senilis (Spix). 



2 specimens. Guayabo cT, 9. This pair was secured from the 

 top of a tree at one shot. Dissection showed active sexual organs. 



Pionopsittacus hasmatotis (Scl. & Salv.). 



5 specimens. Guayabo d\ 9 ; Coliblanco 2 d\ i 9 . 



These birds were usually seen in pairs, each bird of which mani- 

 fested the greatest attachment for the other. A favorite habit of 

 the birds was to perch on a high dead branch and sun themselves for 

 an hour or longer. 



Momotidse. 



Momotus lessoni (Less.}. 



i specimen. Guayabo 9 . 



