STELGIDOPTERYX UROPYGIALIS [Lawr.). 



ASHY-RUMPED ROUGH- WINGED SWALLOAV. 



Cotyle flavigastra (nee V.), Cass. Proe. Philad. Acad. 1860, p. 133; Scl. P. Z. S. 



1860, p. 292 ; Lawr. Ann. Lye. N. Y. vii. p. 317 (1861). 

 Cotyle ruficollis (nee Vieill.), Sclater, P. Z. S. 1860, p. 292 ; id. Cat. Amer. B. p. 41 



(1862, pt.). 

 Cotyle uropygialis, Lawr. Ibis, 1863, p. 181 ; id. Ann. Lye. N. Y. viii. p. 3 (1863) ; 



Scl. & Salv. P. Z. S. 1861, p. 318 ; Gray, Haud-1. B. i. p. 73, no. 870 (1859). 

 Stelgiclopteryx uropygialis, Baird, R,eview Amer. B. p. 317 (1865) ; Salv. P. Z. S. 



1870, p. 184 ; Wyatt, Ibis, 1870, p. 109 ; Scl. & Salv. Nomencl. Av. Neotr. p. 15 



(1873); iid. P. Z. S. 1879, p. 496; Tacz. P. Z. S. 1877, p. 744; Salvin & Godman, 



Biol. Centr.-Amer., Aves, i. p. 238(1883); Sliarpe, Cat. Birds in Brit. AIus. x. 



pp. 209, 637 (1885); Tacz. Orn. Perou, i. p. 247 (1881). 

 Stelgiclopteryx fulvigula, Baird, Review Amer. B. p. 318 (1865) ; v. Frantz. J. f. O. 



1869, p. 295 ; Salv. Ibis, 1869, p. 313, 1870, p. 108, 1874, p. 307. 

 Cotyle fulvigula, Gray, Hand-1. B. i. p. 73, no. 871 (1869). 



<S. similis S. ruficolli, sed saturatior ct uropygio magis cinerascente. 



Hab. in Costa Rica usque ad Panamam, Venezuelan}, Colouibiam et regionem Andesiensem usque ad 

 Ecuadoriam et Peruviana occidentalem. 



Adult male. Similar to S. ruficollls, from which it differs only in having the upper surface much darker 

 and the rump more ashy and in rather more pronounced contrast to the back. The brown on 

 the under surface is darker on the breast and flanks, and the yellow on the abdomen somewhat 

 more restricted. Total length o inches, culmen 04, wing 4'2, tail 1*9, tarsus O3o. 



Adult female. Similar to the male in colour. Total length 4 - 5 inches, culmen 0'1, wing 3 - 9, tail P8, 

 tarsus CM'. 



Young. Differs from the adult in having the rump creamy buff, and in having distinct rufous margins to 

 the feathers of the upper surface, especially the wing-coverts and inner secondaries ; the throat 

 is bright rufous, as well as the fore neck ; the sides of the body brown washed with rufous, and 

 the rest of the underparts white with a slight tinge of yellow. 



Hab. Central America, from Costa Rica to Panama. In South America, from Venezuela to Colombia, 

 Western Ecuador and Western Peru. 



This is a northern race of the ordinary Stelgiclopteryx ruficollis of South America, from 

 which it differs in the ashy colour of the rump. This character is always well marked 



2o2 



