ATTICORA TIBIALIS (Cauin). 



WHITE-THIGHED SWALLOW. 



Petrochelidon ? tibialis, Cass. Proc. Philad. Acad. 1853, p. 370 ; id. Cat. Hirund. 



Mus. Philad. Acad. p. 6 (1853). 

 Microchelidon tibialis, Sclater, Cat. Amer. B. p. 39 (1862). 

 Neocheliclon tibialis, Sclater, t. c. p. xvi, errata (1862) ; Scl. & Salv. P. Z. S. 1861, 



p. 317 ; iid. P. Z. S. 1S69, p. 598. 

 Atticora tibialis, Baird, Peview Amer. B. p. 307 (1865) ; Cray, Hand-1. B. i. p. 72, 



no. 859 (1869) ; Scl. & Salv. Nomencl. Av. Neotr. p. 11 (1873) ; iid. P. Z. S. 1879, 



p. 495 ; Salv. & Godm. Biol. Centr.-Auier., Aves, i. p. 231 (1883) ; Tacz. Orn. 



Perou, i. p. 212 (1881) ; Sbarpe, Cat. Birds in Brit. Mus. x. p. 185 (1885). 



A. subtus brunnea : tibiis albis. 



Hab. in America centrali et in provincia Colombian;! America meridionalis usque ad Peruviam. 



Adult. General colour above sooty brown, witb an oily green gloss on the head and back, the rump and 

 upper tail-coverts rather paler brown ; wing-coverts and quills glossy brown ; tail slightly forked, 

 the feathers glossy brown : lores velvety black ; ear-coverts aud sides of neck dark brown, the 

 latter with a slight greenish gloss like the head ; cheeks and entire under surface of body dark 

 earthy brown, a little darker on the under wing- and tail-coverts; thighs white; quills dusky 

 brown below. Total length 4 - l inches, culnien 025, wing 3'3, tail 1-8, tarsus 04. 



A male from Antioquia (Salmon), in the Salvin-Godman collection, is moulting, and shows 

 that the new feathers on the head and mantle and wings are distinctly greenish black ; the under 

 surface is also deeper and more sooty brown; and it is evident that the pale coloration in some 

 specimens is caused by the age and abrasion of the feathers. 



Hab. From Panama to Colombia, extending- as far south as Peru. 



This species is easily distinguished by its white thighs, which contrast strongly with its 

 brown under surface. It was first described by the late Mr. Cassin as from Brazil, a 

 locality which has not been confirmed by any subsequent observer, although Messrs. 

 Salvia and Godman mention that in the Cambridge Museum there is a Swainsonian 

 specimen said to be from Brazil. The Sclater collection also had a skin supposed to be 

 Brazilian, but all these records are probably erroneous. 



The late Mr. J. McLeannan procured tbis Swallow on the line of railway in Panama, 

 and subsequently it was met with by Mr. Salmon in Antioquia, breeding near Pemedios. 

 A Colombian specimen also exists in the Bremen Museum. Mr. Wyatt has the following 



2b2 



