714 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



CYPSELOIDES BRUNNEITORQUES GRISEIFRONS (Nelson). 



TEPfC SWIFT. 



Similar to C. h. hrunneitorques, but coloration paler (the back, etc., 

 deep sooty instead of nearly black, the under parts of body grayish 

 sooty), and feathers of forehead (in both sexes) margined with pale 

 grayish, these margins becoming broader and whitish on sides of 

 forehead, along upper margin of loral region. 



Adult male. — Length (skin), 127.5; wing, 119 (primaries much 

 worn at tip); tail, 41 (worn at tip); exposed culmen, 6.5; tarsus, 

 12.5; middle toe, 8.5.« 



Adult female. -Ajength (skins), 125-127 (126); wing, 121.5-123 

 (122.2); tail, 40-42.5 (41.2); exposed culmen, 6; tarsus, 12-12.5 

 (12.2); middle toe, 8-8.5 (8.2).'' 



Western Mexico, in Territory of Tepic (Santa Teresa) ; also (ac- 

 cording to Nelson) SieiTa MacU*e of Jalisco, western Zacatecas, and 

 southern Durango. 



Cypselus brunneitorques griseifrons Nelson, Auk, xvii, July, 1900, 262 (Santa 

 Tenesa, Tepic, w. Mexico; coll. XJ. S. Nat. Mus.). 



CYPSELOIDES CHERRIEI Ridgway. 



CHEERIE'S SWIFT. 



Adult {male?). — Uniform deep, dark sooty, very slightly paler 

 below (the chin sooty grayish), the remiges and rec trices very slightly 

 darker (almost sooty black); lores sooty black; a conspicuous white 

 spot on each side of forehead and a smaller- postocular spot or streak 

 of white; bill black; iris dark brown; legs and feet dusky (in dried 

 skin); length (skin), 129.5; wing, 127; tail, 47; exposed culmen, 6; 

 tarsus, 13; middle toe, 9.'^ 



Adult female'^: — Similar to the adult male(?), as described above, 

 but white spots on forehead slightly smaller, postocular white spot 

 or streak wanting, and feathers of abdomen and flanks tipped, nar- 

 rowly, with white; length (skin), 118; wing, 123; tail, 46.5; exposed 

 culmen, 6; tarsus, 13; middle toe, 9.'^ 



High mountains of Costa Rica (Volcan de Irazu). 



Cypseloides cherriei Ridgway, Proc. U. S. Nat. Mus., xvi, no. 923, June 13, 1893, 

 • 44 (Volcan de Irazu, Costa Rica; coll. U. S. Nat. Mus.). — Salvin and God- 

 man, Biol. Centr.-Am., Aves, ii, 1892, 380. — Carriker, Ann. Carnegie Mus., 

 vi, 1910, 510 (Costa Rica). 



C[ypseloides] cherriei Haktert, DasTierreich, Podarg., Caprim., Macropt., 1897,80. 



[Cypseloides] cherriei Sharpe, Hand-list, ii, 1900, 94. 



Genus CH^^TURA Stephens. 



Chsetura Stephens, Shaw's Gen. Zool., xiii, pt. ii, 1825, 76. (Type, Hirundo 



pelagica Linnaeus.) 

 Acanthylis Boie, Isis, 1826, 971. (Type, Hirundo spinicauda Temminck.) 

 Acanthyllis (emendation) Newton (A. and E.), Handb. Jamaica, 1881, 108. — 



Hartert, Cat. Birds Brit. Mus., xvi, 1892, 470, footnote. 



o One specimen (the type). *) Two specimens. c One specimen. 



