Marcu 19, 1908 VoL. IV, PP. 23-35 
PROCEEDINGS 
OF THE 
NEW ENGLAND ZOOLOGICAL CLUB 
ON CERTAIN COSTA RICAN BIRDS. 
BY OUTRAM BANGS. 
Tue followmg notes, records, and descriptions of a few new 
birds from Costa Rica and Panama, are based on material re- 
ceived, for the most part, from C. F. Underwood during the last 
few years, and are here all published together for the sake of con- 
venience. 
Ridgway in his great work, ‘The Birds of North and Middle 
America,’ has clearly pointed out the characters of some of the forms 
to which I now give names. In such cases of course I claim no 
new discoveries by myself, but merely that the accession of more 
ample or better material proves Ridgway to have been right in 
suspecting that these forms represented valid subspecies. 
Coccyzus americanus occidentalis Ridg. 
In Costa Rica true Coccyzws americanus is by far the commoner 
yellow-billed cuckoo, occurring, probably, only as an autumn and 
winter visitor, though I have a specimen taken as early as August; 
but the much larger bird that breeds in the Pacific coast region of 
North America—C. americanus occidentalis — also occasionally 
reaches Costa Rica on migration, as proved by an extremely char- 
acteristic example taken at San José, Oct. 25, 1905. This specimen, 
an adult male, no. 19,221, Bangs coll., had not undergone a com- 
plete autumnal moult; the rectrices are abraded, with the ends of 
