714 BULLETIN 50, UNITED. STATES NATIONAL MUSEUM. 
CYPSELOIDES BRUNNEITORQUES GRISEIFRONS (Nelson). 
TEPIC SWIFT. 
Similar to C. b. brunneitorques, but:coloration paler (the baek, etc., 
deep sooty instead of nearly black, the under parts of body grayish 
sooty), and feathersiof 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—tLength (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) Sierra Madre of Jalisco, western Zacatecas, and 
southern Durango. 
Cypselus. brunneitorques griseifrons NEtson, Auk, xvii, July, 1900, 262 (Santa 
Texesa, Tepic, w. Mexico; coll. U. 8. Nat. Mus.). 
CYPSELOIDES CHERRIEI Ridgway. 
CHERRIE’S SWIFT. 
Adult (male?)—Uniform deep, dark sooty, very slightly paler 
below (the chin.sooty grayish), the remiges and rectrices 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 Irazt). 
Cypseloides cherriei Rrpaway, Proc. U. 8. Nat. Mus., xvi, no. 923, June 18, 1898, 
44 (Volcan de Irazt, Costa Rica; coll. U. 8. Nat. Mus.).—Satvin and Gop- 
MAN, Biol. Centr.-Am., Aves, ii, 1892, 380.—CarrixEerR, Ann. Carnegie Mus., 
vi, 1910, 510 (Costa Rica). 
Clypseloides] cherriei Harter, Das Tierreich, Podarg., Caprim., Macropt., 1897, 80. 
[Cypseloides] cherriet Sharpe, Hand-list, ii, 1900, 94. 
Genus CHAATURA Stephens. 
Chetura StepHENns, Shaw’s Gen. Zool., xiii, pt. ii, 1825, 76. (Type, Hirundo 
pelagica Linneeus.) 
Acanthylis Bots, Isis, 1826, 971. (Type, Hirundo spinicauda Temminck.) 
Acanthyllis (emendation) Newron (A. and E.), Handb. Jamaica, 1881, 108.— 
Hartenrt, Cat. Birds Brit. Mus., xvi, 1892, 470, footnote. 
@ One specimen (the type). b Two specimens. ¢Qne specimen. 
