28 BANGS — COSTA RICAN BIRDS Pa 
Myiobius xanthopygus, 1 have had an opportunity of examining 
much additional material — upward of thirty skins from Costa 
Rica and a very interesting little series from British Honduras. 
There is no question that two distinct subspecies occur in Middle 
America, and Ridgway was right, I thmk, m supposing that the 
more northern one is confined to southern Mexico. Skins from 
British Honduras are intermediate, some being very nearly like 
Mexican ones, others showing an approach to the Central American 
form. Probably the bird of northern Guatemala, which I have 
not seen, would be the same. Thence southward over the whole 
of Central America, from Honduras to Panama, occurs only the 
new form, easily told from M. xanthopygus sulphurerpygius 
(Sclater) of southern Mexico (type locality, Cordova, Vera Cruz, 
Mexico) by smaller size, paler under parts and light yellow instead 
of pale cinnamon-brown, under tail coverts. 
Zeledonia coronata Ride. 
Twenty skins of this species, taken on Irazti in December, 1906, 
and January, 1907, prove inseparable in any way from specimens 
from Pods, Costa Rica, on the one hand, and from the Volean de 
Chiriqui, Panama, on the other. 
Zeledonia insperata Cherrie was evidently therefore — as sug- 
gested by Ridgway (‘Birds of North and Middle America,’ Part IV, 
p. 72, foot-note)— based on an abnormally colored, probably 
partially albinistic, dividual. 
Troglodytes ochraceus Ridg. 
At the time Ridgway wrote his account of this wren for Part II 
of his great work, but little material was available; he had, I believe, 
only the type of ochraceus from Irazti, Costa Rica, and four skins 
from the Volean de Chiriqui, Panama, taken by Brown. Since 
then I have received from Underwood seven examples of 7. ochra- 
ceus from Irazi, and comparing these critically with the Chiriqui 
