38 BANGS CHIRIQUI BIRDS [ ^'vli'uf' 



Type, from Boquete, southern slope of Volcan de Chiriqui, 4000 feet alti- 

 tude, $ adult, no. 8543, coll. of E. A. and O. Bangs, collected Jan. 21, 1901, 

 by W. W. Brown, Jr. 



Characters. — Most like the South American JT. cineracea, except lacking 

 the conspicuous white edgings of the wings of that species. Differing from 

 S. aquatica of Guatemala and southern Mexico in larger size, blacker color 

 throughout, less white on belly, and in having black under tail coverts — they 

 are cinereous in S. aquatica. 



Color. — Black, including under tail coverts, middle of back slightly grayer; 

 small patch in middle of belly white ; wing feathers slightly edged with grayish ; 

 outer web of outer rectrix white ; under wing coverts mixed white and black. 



measurements 1 (in millimeters). 



Remarks. — A series of skins from Costa Rica, in the National 

 Museum, are similar in every way to the three taken by Mr. 

 Brown on the Volcan de Chiriqui. Sayornis amnicota is very 

 different from its northern representative, S. aquatica, as also 

 from S. cineracea of South America ; and while all the black 

 phoebes may eventually prove to be subspecies of one wide-ranging 

 bird, I prefer to regard it as a distinct species. 



Empidonax traillii (Aud.). 



One adult male, in worn plumage, Pedregal, Aug. 21. There 

 is no doubt that this bird is the North American E. traillii, Mr. 

 Ridgway having carefully examined it. The date at which it was 

 taken in Chiriqui is remarkable, and suggests that possibly it may 

 have been left behind in the spring migration and have spent the 

 summer here. 



1 Sclater, Cat. Birds British Museum, Vol. XIV, gives the wing measurements of both 5 1 . 

 aquatica and .S". cineracea as 3.4 inches. I find that females are smaller than males, and that 

 aquatica is a smaller bird than cineracea, the new species agreeing in this respect with the 

 latter (cineracea). 



