STELGIDOPTERYX. 237 
-STELGIDOPTERYX. 
Stelgidopteryx, Baird, Birds N. Am. p. 312 (1858) ; Rev. Am. B. i. p. 312. 
The American Rough-winged Swallows were usually placed in the genus Cottle 
prior to Prof. Baird’s separation of them, first as a subgenus in 1858, and afterwards 
as a genus in 1865. Their general colour-resemblance to C. riparia probably led to 
this arrangement. Prof. Baird, however, pointed out that not only was the outer web 
of the primaries roughened by the barbs of the feather being pointed and recurved, but 
that the nostrils opened upwards without any overhanging membrane. ‘These characters 
seem enough to separate Stelgidopteryx from the rest of the American Swallows. 
Prof. Baird indicated five species of this genus in his ‘ Review of American Birds ;’ 
but these, we think, ought to be reduced to three, S. fudvipennis being, in our opinion, 
not separable from S. serripennis, and S. fulvigula and S. uropygialis being young and 
adult of the same bird. We thus have:—a North-American species, S. serripennis, 
which spreads over Mexico and Central America as far as the State of Panama; 
S. uropygialis, which is found in Central America as far north as Costa Rica, and 
thence extends over the northern parts of South America; and, lastly, S. rujficollis, 
which is found in Brazil and Bolivia, and northwards to the Amazons valley and 
Eastern Ecuador. | 
S. serripennis is a fairly well defined species; but the limits between S. wropygialis 
and S. ruficollis are not so definite. 
1. Stelgidopteryx serripennis. 
Hirundo serripennis, Aud. Orn. Biogr. iv. p. 593°. 
Cotyle serripennis, Scl. P. Z. S. 1856, p. 285°; Cat. Am. B. p. 41°; Baird, U.S. Bound. Surv. 1. 
Birds, p. 11’; Scl. & Salv. Ibis, 1859, p. 13’; Owen, Ibis, 1861, p. 61°; Dresser, Ibis, 
1865, p. 479". 
Stelgidopteryx serripennis, Baird, Rev. Am. B. i. p. 314°; Sumichrast, Mem. Bost. Soc. N. H. 1. 
p. 547°; Baird, Brew. & Ridgw. N. Am. B. i. p. 850" ; Cones, B. Col. Vall. 1. p. 438". 
Cotyle fulvipennis, Scl. P. Z. S. 1859, p. 364°; Scl. & Salv. Ibis, 1860, p. 31 a 
Stelgidopteryx fulvipennis, Baird, Rev. Am: B. i. p. 316"; Lawr. Ann. Lye. N.Y. ix. p. 200”; 
Salv. P. Z. S. 1870, p. 184°; Ibis, 1870, pp. 109, 114". 
Stelyidopteryx fulvigula, Lawr. Ann. Lye. N. Y. ix. p. 96 (nec Baird). 
Murino-brunnea, alis et cauda nigricantibus, secundariis extus albo tenuissime limbatis, subtus dilutior, gula et 
ventre medio sordide griseis, illa aliquando rufescenti tincta, crisso albo ; rostro et pedibus nigricantibus. 
Long. tota 4°7, alse 4:6, caude 2:3, rostri a rictu 0°55, tarsi 0-4. (Deser. maris ex Duenas, Guatemala. 
Mus. nostr.) 
Av. hornot. pectore rufescente, secundariis extus et alarum tectricibus rufescentibus differt. (Descr. exempl. 
ex Duefias, Guatemala. Mus. nostr.) 
Hab. Norta America (except N.E. States) from Canada and British Columbia south- 
wards 11, Texas 7—Mexico, Nuevo Leon (Couch* ®), valley of Mexico (le Strange), 
Cordova (Sallé?), Orizaba (Botteri* 14), Jalapa (de Oca? ™), State of Vera Cruz 
