38 BANGS — CHIRIQUI BIRDS P.N-ELZ.C. 
Type, from Boquete, southern slope of Volcan de Chiriqui, 4000 feet alti- 
tude, g 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 S. cénzeracea, 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 6/ack under tail coverts — they 
are Cinereous in S. aguatica. 
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 ! (in millimeters). 
No. Sex and age Wing Tail Tarsus Culmen 
8543 Gad: 89. 78. 18.0 L5G 
8544 Q ad. 83. 74. 16.5 15-5 
8545 g ad. 85. 76. 16.5 15.5 
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 amnicola is very 
different from its northern representative, S. aguatica, as also 
from .S. cimeracea of South America; and while all the black 
phcebes 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 &. fraz/iii, 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 S. 
aquatica and S. cineracea as 3.4 inches. I find that females are smaller than males, and that 
aguatica is a smaller bird than céneracea, the new species agreeing in this respect with the 
latter (cineracea). 
