STELGIDOPTERTX. 237 



STELGIDOPTERYX. 

 teryw, Baird, Birds N. Am. p. 312 (1858) ; Rev. Am. B. i. p. 312. 



The American Rough-winged Swallows were usually placed in the genus Cotile 

 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 Stelgidopteryw 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. fulvifennis 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. ruficollis, 

 which is found in Brazil and Bolivia, and northwards to the Amazons valley and 

 Eastern Ecuador. 



8. serripennis is a fairly well defined species ; but the limits between S. urapygialis 

 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. ii. 



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. i. 



p. 547°; Baird, Brew. & Ridgw. N. Am. B. i. p.. 350 " ; Coues, B. Col. VaU. i. p. 438 ". 

 Cotyle fulvipennis, Scl. P. Z. S. 1859, p. 364 '^ Scl. & Salv. Ibis, 1860, p. 31 ". 

 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 ". 

 Stelgidopteryx fulvigula, Lawr. Ann. Lye. N. Y. ix. p. 96" (nee Baird). 



Mmdno-brunnea, alis et cauda nigricantibus, secundariis extus albo tenuissime Umbatis, subtus dUutior, gula et 



ventre medio sordide griseis, iHa aliquando rufescenti tincta, crisso albo ; rostro et pedibns nigricantibus. 



Long, tota 4-7, ate 4-6, caudffi 2-3, rostri a riclni 0-55, tarsi 0-4. (Descr. maris ex DueSas, Guatemala. 



Mus. nostr.) 



Av. hornot. peotore rufescente, secundariis extus et alarum teetricibus rufescentibus differt. (Descr. exempl. 



ex Duefias, Guatemala. Mus. nostr.) 

 Eab. NoETH 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 (Salle ^), Orizaba {Botteri^^% Jalapa [de Oca^^ ^% State of Vera Cruz 



