CHATURA.—CYPSELOIDES. 379 
The fact of there being a marked difference in the plumage between the sexes of this 
species is a peculiarity in the family only shared by C. rutila of Guiana and Trinidad. 
Dissected specimens proved that the male has the red collar, and that the female is 
without it. 
The southern extension of the range of C. brunneitorques reaches Ecuador, whence 
we have seen several specimens ?. Its northern limit includes Southern Mexico, where 
Mr. le Strange found it and where Sumichrast says that it is resident and breeds in the 
State of Vera Cruz near Tuxpango and Orizaba 8, Sefior Ferrari-Perez also found it at 
San Miguel Molino in the State of Puebla. 
The only species at all nearly related to C. brunneitorques is C. rutila (Vieill.) of 
Guiana and Trinidad, and with which it was for some time confounded2. C. rutila has, 
however, the chin as well as the cervical collar of a clearer paler rusty red, the dark 
crown being more restricted posteriorly, and other slight differences. 
Mr. Hartert, in his Catalogue of the Cypselide in the British Museum, removed 
C. brunneitorques and C. rutila from Chetura, and placed them in Cypseloides. As the 
shafts of the rectrices are distinctly spinous, though perhaps hardly so much so as in 
typical Cheiura (in Cypseloides the points are not at all prominent), the two species 
in question are best placed in Chetura. 
CYPSELOIDES. 
Cypseloides, Streubel, Isis, 1848, p. 366 ; Hartert, Cat. Birds Brit. Mus. xvi. p. 492. 
The shafts of the rectrices in this genus are not produced beyond the webs of the 
feathers, and therefore the tail is not provided with the spiny points which form such 
a conspicuous feature in Chetura. Cypseloides thus to outward appearance much more 
resembles the true Swifts, but it has the normal number of phalanges to the third and 
fourth toes, so that it really falls into this section of the family. | 
Mr. Hartert includes five species in the genus, but we think that C. ruta and 
C. brunneitorques belong more properly to Chetura. To the three remaining species 
C. cherriei must be added, making four in all, of which two occur within our limits. 
The other two are confined to South America. 
1. Cypseloides niger. v 
Hirundo apos dominicensis, Briss. Orn. ii. p. 514, t. 46. £, 37. 
Hirundo niger, Gm. Syst. Nat. i. p. 1025”. 
Cypselus niger, Gosse, Birds Jam. p. 63°; Ill. Birds Jam. t. 10°. 
Cypseloides niger, Scl. P. Z. S. 1865, p. 615°; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 120°; 
Cory, Birds W. Ind. p. 140"; Hartert, Cat. Birds Brit. Mus. xvi. p. 494°; Cherrie, Auk, 
1892, p. 824°. 
Nephecetes niger, Sumichrast, Mem. Bost. Soc. N. H. i. p.562°; Baird, Brew., & Ridgw. N. Am. 
Birds, ii. p. 429”. 
Cypselus borealis, Kennerly, Pr. Ac. Phil. 1857, p. 202 ™. 
Cypseloides borealis, Scl. P. Z.S. 1865, p. 615°; Hartert, Cat. Birds Brit. Mus. xvi. p. 495 *. 
48* 
