378 CYPSELID®. 
Skins of this Swift sent us by our collector Arcé from Chiriqui were the first that 
reached us and were described by Salvin in 18701. Soon afterwards Mr. C. W. Wyatt 
shot a specimen in a clearing in the forest near Naranjo in Colombia at an elevation of 
2500 feet above the sea?. Mr. Wickham obtained a specimen at Santarem on the 
Amazons river, and Mr. Layard others at Para, where he says the bird is common 
throughout the year *¢. 
We have recently acquired a specimen of the Swift found in Nicaragua and Costa Rica 
by Mr. C. W. Richmond and referred by Mr. Ridgway > and by him § to Mr. Hartert’s 
C. cinereiventris guianensis. ‘This we have compared with our types of C. fumosa, and 
can find no tangible differences; in fact the only point that we notice is that the 
longest upper tail-coverts are slightly darker in C. fumosa, and in Mr. Richmond’s 
specimen grayer, but the latter are somewhat abraided and the difference at most but 
very slight. As the Costa Rica and Nicaragua bird occurs on the outskirts of the 
northern range of C. fumosa, we have no hesitation in placing it under that name. 
Mr. Richmond shot two specimens on the Rio Frio from a large company of Swifts, 
and collected others on the estate of the International Plantation Company on the Rio 
Escondido, where it appeared to be common, associating with C. gaumeri ®. 
ce. Minor: mas torque cervicali ferrugineo. 
7. Chetura brunneitorques. 
Chetura brunneitorques, Lafr. Rev. Zool. 1844, p. 81'; Salv. & Godm. Ibis, 1882, p. 83°; Zeledon, 
An. Mus. Nac. Costa Rica, 1887, p. 120°; Cherrie, Auk, 1892, p. 324°. 
Cypseloides brunneitorques, Hartert, Cat. Birds Brit. Mus. xvi. p. 493°. 
Chetura rutila, Scl. & Salv. (nec Vieill.), Ibis, 1860, p. 37, t.3°; P. ZS. 1869, p. 83637; Sumi- 
chrast, Mem. Bost. Soc. N. H. i. p. 562°; La Nat. v. p. 250°. 
Fuliginoso-nigra, gula et abdomine vix dilutioribus, torque cervicali undique rufo, antice latiore, et plumarum 
omnium rhachidibus nigris : rostro et pedibus nigris. Long. tota circa 5:0, alee 5:0, caudee 1:2, tarsi 0°45. 
Q mari similis, sed torque cervicali rufo nullo. (Descr. maris et femine ex Duefias, Guatemala. Mus. nostr.) 
Hab. Muxico (le Strange"), Tuxpango near Orizaba (Sumichrast §°), Orizaba (Sumi- 
chrast, in U. S. Nat. Mus.), San Miguel Molino (F. Ferrari-Perez) ; Guatemaa, 
Plains near Duefias (0. S. & F. D. G.®); Costa Rica (Van Patten, in U. S. Nat. 
Mus.), San José (Zeledon*, Cherrie*); Panama, Chiriqui, Calovevora (Arcé).— 
CotomBiA +; Ecuador? ’. 
This species was described in 1844 by Lafresnaye from specimens from Colombia}, 
from which country there are several examples in the British Museum. These agree 
with a series from various parts of Central America and Southern Mexico, including 
the birds obtained by us on various occasions at Duefias and its neighbourhood. 
In the last-named locality C. brunneitorques is not unfrequently to be seen in flocks 
flying over the open country, especially in the wet season from July to October. On 
cloudy rainy afternoons the birds would fly near the ground and within gun-shot, at 
other times they would circle round like ordinary Swifts high in the air. 
