NO. Q BIRDS OF ISLA COIBA, PANAMA—WETMORE Fi. 
white, washed with pinkish buff; sides of neck and breast pinkish 
buff; sides tawny-olive; flanks sayal brown bordering abdomen, 
changing to snuff brown toward the rump, barred faintly and spar- 
ingly with neutral gray ; under tail coverts clay color, barred broadly 
with dusky neutral gray; under surface of tail olive-brown, with 
indistinct bars of dark neutral gray; edge of wing and under wing 
coverts pinkish buff, the latter white distally. Maxilla fuscous-black; 
tip of mandible hair brown, base pale olive-buff ; tarsus and toes dark 
hair brown (from dried skin). 
Measurements.—Males (11 specimens), wing 51.5-53.5 (52.2), tail 
34.0-37.1 (35.5), culmen from base 16.9-19.1 (17.8), tarsus 18.6-20.5 
(19.4) mm. Females (2 specimens), wing 49.0-50.1 (49.5), tail 31.5- 
33.2 (32.3), culmen from base 17.3-17.4 (17.3), tarsus I9.4-19.9 
(19.6) mm. 
Type, male, wing 52.4, tail 35.2, culmen from base 17.8, tarsus 
19.1 mm. 
Range.—Isla Coiba, off the Pacific coast of Veraguas, Panama. 
Remarks.—The decidedly darker coloration of this race as com- 
pared to the house wren of the Panamanian mainland was evident 
immediately when I first saw the birds about the buildings at the 
Colonia Penal. In fact, it is so different from the other house wrens 
of Central America not only in color but in larger bill that it might 
be considered a distinct species, if it were not for the marked di- 
versity of form found in the related subspecies in South America 
and the Lesser Antilles. Three juvenal birds from Coiba, secured 
as they were about to leave the nest, compared with young of equiva- 
lent age of T. m. inquietus from the provinces of Veraguas and 
Panama, are decidedly more brown on the lower surface, especially 
on the sides, flanks, and under tail coverts. The brown of the upper 
surface is slightly warmer, particularly on the rump, while the crown 
is slightly darker than the back instead of equivalent in color. Com- 
pared with juvenals of T. m. intermedius from Costa Rica the Coiba 
birds are more similar but differ in somewhat warmer brown on the 
sides, flanks, and under tail coverts, lighter, brighter color on the 
rump, and darker crown color. 
The new form in color, as indicated in the diagnosis, appears some- 
what similar to T. m. intermedius, but has the bill very much larger 
and heavier. 
The subspecific name carychrous is taken from the Greek 
kapvxpoos, nut brown. 
