STELGIDOPTERYX.—COTILE. 239 
S. serripenni similis, uropygio canescente, gula fulva, ventre medio flavicante, et crisso fusvo terminato distin- 
guenda. (Descr. maris ex Panama. Mus. nostr.) 
Av. hornot. gula tota et pectore fulvis, secundariis extus et tectricibus alarum fulvo marginatis. (Desc. exempl. 
ex Costa Rica. Mus. nostr.) 
Hab. Costa Rica (v. Frantzius °), Angostura (Carmiol®); Panama, Chitra (Arcé ®), line 
of railway (M‘Leannan!??4 12), Obispo (0. S.), Rio Truando (Schott 4 1).— 
CoLomBIA >; GUIANA. 
This species is very closely allied to the Brazilian S. 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 
Kcuador 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. 
Regarding 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 JS. wro- 
pygiauis; 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. wropygialis, and that Salvin’s views respecting these birds, 
given in ‘ The Ibis’ for 1870°% and 1874 11, and which are adopted here, are correct. 
Stelgidopteryx uropygialis was first separated by Mr. Lawrence from 8. rujficollis, 
specimens having been supplied him from Panama by M‘Leannan!. We, too, have 
examples from the same source ; and the bird was subsequently seen in abundance at 
Obispo by Salvin in May 1873, its favourite resting-place being the telegraph-wires 
placed along the line of railway. Salmon, who observed S. wropygialis breeding near 
Remedios in the Cauca valley, obtained its eggs, which are white; but he says nothing 
of its nest’. 
COTILE. 
Cotile, Boie, Isis, 1822, p. 550. \N 
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 Cottle 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 Hirwndo, as the 
spots on the rectrices, their building-habits, and their spotted eggs testify. 
