BIRDS OF NORTH AND MIDDLE AMERICA. 711 
latter more acuminate terminally); tail about one-third as long as 
wing (in C. brunneitorques) to nearly two-fifths as long (in C. cherriet), 
slightly emarginate (C. brunneitorques) or truncate (C. cherrier), the 
rectrices with rigid and slightly extended (protruded) shafts; tarsus 
decidedly longer than middle toe with claw; outer toe very nearly if 
not quite as long as middle toe, the inner nearly as long in. C. brun- 
neitorques, decidedly shorter in C. cherriei; hallux (without claw) 
more than half as long as inner toe (without claw). 
Coloration.—Plain dark sooty or blackish; one species with a 
white spot’ on each side of forehead (in both sexes?), two with a 
rufous collar in adult male. 
Nidification—Nest (of C. brunneitorques) composed of moss, 
shallow and compact, placed in dark culverts, near water (probably 
in rocky banks or cliffs also).* 
Range.—Southern Mexico to Brazil and Peru. (Five species.) 
KEY TO THE SPECIES OF CYPSELOIDES. 
a. A rufous collar round neck. 
b. Chin and throat rufous. (Guiana and Trinidéd.) 
Cypseloides rutilus (extralimital).® 
bb. Chin and throat dark sooty. (Southern Mexico to Peru.) 
c. Coloration darker (back, etc., sooty black, under parts deep sooty grayish 
brown). (Southeastern Mexico to Peru.) 
Cypseloides brunneitorques brunneitorques (p. 712). 
ce. Coloration paler (back, etc., sooty brown, under parts sooty grayish. (Western 
MOXIC0 is cis os Seeusaree Cypseloides brunneitorques griseifrons (p. 714). 
aa. No rufous on neck. 
b. No white on head. 
c. Smaller (wing less than 150 mm.). 
d. Smaller (wing less than 135 mm.). 
Cypseloides brunneitorques brunneitorques, adult female (p. 712). 
dd. Larger (wing more than 145 mm.). (Brazil, Peru, and Ecuadér.) 
Cypseloides fumigatus (extralimital).¢ 
ec. Larger (wing 175 mm.). (Brazil.)......... Cypseloides senex (extralimital).¢ 
bb. A white spot on each side of forehead. (Costa Rica.) 
Cypseloides cherriei (p. 714). 
@ Orton, Am. Nat., iv, 1871, 713. 
b Hirundo rutila Vieillot, Nouv. Dict. d’Hist. Nat., xiv, 1817, 528.—Chetura 
rutila Sclater, Proc. Zool. Soc. Lond., 1863, 100, part.—Cypseloides rutilus Hartert, 
Cat. Birds Brit. Mus., xvi, 1892, 493; Das Tierreich, Podarg., Caprim., Macropt., 
1897, 79.—Hirundo robini Lesson, Traité d’Orn., 1830, 270. 
¢ Hemiprocne fumigata Streubel, Isis, 1848, 366.—Cypseloides fumigatus Sclater, 
Proc. Zool. Soc. Lond., 1865, 615; Hartert, Cat. Birds Brit. Mus., xvi, 1892, 496; 
Das Tierreich, Podarg., Caprim., Macropt., 1897, 80.—Nephocextes fumigatus Pelzeln, 
Orn. Bras., i Abth., 1868, 16.—[Chetura] fumigatus Gray, Hand-list, i, 1869, 68. 
@ Cypselus senex Temminck, Pl. Col., 1826, 397.—Acanthylis senex Bonaparte, 
Consp. Av., i, 1849, 65.—Cypseloides senex Sclater, Proc. Zool. Soc. Lond., 1865, 614; 
Hartert, Cat. Birds Brit. Mus., xvi, 1892, 496; Das Tierreich, Podarg., Caprim., 
Macropt., 1897, 80.—Chextura senex Pelzeln, Orn. Bras., i Abth., 1868, 16—Hemiprocne 
temminckii seu temminckiana Streubel, Isis, 1848, 368.—Chxtura major Bertoni, 
Revista de Agronomfa, ii, 1900, 58.—Aérornis niveifrons Bertoni, Aves Nuevas del 
Paraguay, 1901, 66. 
