JULY 31, 1901 VOL. II, pp. 57-60 
PROCEEDINGS 
OF THE 
NEW ENGLAND ZOOLOGICAL CLUB 
NOTES ON THE AMERICAN ROUGH-WINGED 
SWALLOWS, WITH DESCRIPTION OF A 
NEW SUBSPECIES. 
BY OUTRAM BANGS. 
THE rough-winged swallow of northeastern South America has 
been mentioned by several ornithologists, and its characters have 
been pointed out, but it seems never to have had a special 
name given it. Sclater in 1860," in his list of birds collected by 
Fraser ,at Esmeraldas, Ecuador, mentioned the light color of the 
rump, as compared with true Stelgidopteryx rujicollis, and Sharpe 
in 1885,” under the head of S. uropygialis, described the form 
found in Colombia and British Guiana, but did not name it, add- 
ing that some, but not all, of the examples from Ecuador were 
the same. 
This bird is the prettiest and most highly colored of the Amer- 
ican rough-winged swallows. From 5S. rujicollis of Brazil it can 
be told by its ashy rump and paler general coloration, and from 
S. uropygialis of Panama by its strongly yellow belly and under 
tail coverts. It is an intermediate form between the two, but 
its characters are constant throughout an enormous area, and it 
must therefore be recognized in nomenclature as a subspecies. 
1 P. Z.S., 1860, p. 292. 
2 Cat. Birds British Museum, 1885, Vol. X, p. 210. 
