8TELGID0PTEETX.— COTILE. 239 



S. serripenni similis, uropygio oanescente, gula fulva, ventre medio fla-noante, at crisso fasco terminato distin- 



guenda. (Descr. maris ex Panama. Mus. nostr.) 

 Av. Tiornot. gula tota et pectore fulvis, secundariis extus et tectrioibus alarum Mvo marginatis. (Desc. exempl. 



ex Costa Eioa. Mus. nostr.) 



Hab. Costa Eica (v. Frantzius ^), Angostura (Carmiol^) ; Panama, Chitra {Arce^), line 

 of railway {M'Leannan^ ^ ^ "^ ^% Obispo {0. S.), Eio Truando (SchoU^^^).— 

 Colombia 5; Guiana. 



This species is very closely allied to the Brazilian iS. ruficollis, so much so that we 

 are not sure that the differential character of the light-coloured rump can always be 

 detected. When Central- American and South-Brazilian examples are compared, the 

 distinction can easily be traced ; but specimens from the Amazons valley and Eastern 

 Ecuador are intermediate, and, though they incline rather to S. ruficollis, the rump is 

 lighter than in typical examples of that species. Guiana birds are of a generally 

 lighter colour, both above and below ; but we hardly think them worthy of separation 

 on that account. 



Eegarding the bird called S.fulvigula, we have an example exactly agreeing with Prof. 

 Baird's description ; but we are convinced that it is only an immature specimen of 8. uro- 

 pygialis ; and having had an opportunity of examining the specimens of Stelgidopteryx 

 in the Smithsonian Institution in 1874, we came to the conclusion that S.fulvigula 

 was merely the young of S. uropygialis, and that Salvin's views respecting these birds, 

 given in ' The Ibis ' for 1870 ^ and 1874 ^^, and which are adopted here, are correct. 



• Stelgidopteryx uropygialis was first separated by Mr. Lawrence from 8. ruficollis, 

 specimens having been supplied him from Panama by M'Leannan i. We, too, hate 

 examples from the same source ; and the bird was subsequently seen in abundance at 

 Obispo by Salvin in May 1873, its favottrite resting-place being the telegra,ph-wires 

 placed along the line of railway. Salmon, who observed 8. uropygialis breeding near 

 Eemedios in the Cauca valley, obtained its eggs, which are white ; but he says nothing 

 of its nest ''. 



COTILE. 



Cottle, Bole, Isis, 1823, p. 550. 



Cotyle, Baird, Rev. Am. B. i. p. 318, et auctt. 



A number of species have been placed in the genus Cotile, few of which properly 

 belong there. From the American Swallows formerly included in Cotile the species of 

 the genus Stelgidopteryx have long been removed, C.fucata alone remaining associated 

 with C. riparia ; but even this bird belongs rather to Atticora, as Prof. Baird has 

 already pointed out; so that Cotile riparia stands the sole representative of the genus 

 in America. In Europe the same state of things is to be found; for C. rupestris and 

 its allies are not true members of Cotile, being more closely allied to Hirundo, as the 

 spots on the rectrices, their building-habits, and their spotted eggs testify. 



