BIRDS OF NORTH AND MIDDLE AMERICA. 711 



latter more acuminate terminally) ; tail about one-tliLrcl as long as 

 wing (in C. hrunneitorgues) to nearly two-fifths as long (in 0. clierrici), 

 slightly emarginate (C. hrunneitorques) or truncate (C. clierriei), the 

 rectrices with rigid and sUghtly 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. hrun- 

 neitorques, decidedly shorter in fJ. clierriei; hallux (without claw) 

 more than half as long as inner toe (without claw). 



Coloration. — Plam dark sooty or blacldsh; one species witli a 

 white spot on each side of forehead (in both sexes?), two with a 

 rufous collar in adult male. 



Nidijlcation. — Nest (of C. hrunneitorques) 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. 



h. Chin and throat rufous. (Guiana and Trinidad.) 



Cypseloides rutilus (extralimital).?' 

 hh. 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 hrunneitorques brunneitorques (p. 712). 

 cc. Coloration paler (back, etc., sooty brown, under parts sooty grayish. (Wetstern 



Mexico.) Cypseloides brunneitorques griseifrons (p. 714). 



aa. No rufous on neck. 

 6. 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 Ecuador.) 



Cypseloides fumigatus (extralimital).« 



cc. Larger (wing 175 mm.). (Brazil.) Cypseloides senex (extralimital).<^ 



66. A white spot on each side of forehead. (Costa Rica.) 



Cypseloides cherriei (p. 714). 



" Orton, Am. Nat., iv, 1871, 713. 



b Ilirundo rutiia Vieillot, Nouv. Diet. d'Hist. Nat., xiv, 1817, 528. — Chxtura 

 rutila Sclater, Proc. Zool. Soc. Lond., 1863, 100, part. — Cypseloides rutilus Hartert, 

 Cat. Birds Brit. Mus., xvi, 1892, 493; Das TieiTeich, Podarg., Caprim., Macro})!., 

 1897, 79.— Hirundo robini Lesson, Traite d'Orn., 1830, 270. 



c Hemiprocne fumigata Streubel, Isis, 1848, 366. — Cypseloides J'undgaLus Sclater, 

 Proc. Zool. Soc. Lond., 1865, 615; Hartert, Cat. Birds Brit. Mus., xvi, 1892, 496; 

 Das Tierreich, Podarg., Caprim., Macropt., 1897, 80. — Nephocxtes fumigatus 'Pclzclu, 

 Orn. Bras., i Abth., 1868, 16. — [Chsetum] fumigatus Gray, Hand-list, i, 1869, 68. 



d Cypselus senex Temminck, PI. 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. — Chxtura senex Pelzeln, Orn. Bras., i Abth., 1868, 16. — Hemiprocne 

 temminckii sou temminchiana Streubel, Isis, 1848, 368. — Chxtura major Bertoni, 

 Revista de Agronomia, ii, 1900, 58. — A'crornis niveifrons Bertoui, Aves Nuevas del 

 Paraguay, 1901, 66. 



