368 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Young male——Similar to the adult male but general coloration 
slightly duller, feathers of upper parts (especially on lower back 
and rump) tipped or terminally margined with pale brown, rectrices 
usually tinged terminally with brownish buffy, under parts of body 
tinged with buffy brownish, and an indistinct malar or rictal stripe 
of pale brownish. 
Western and southern Mexico, in States of Oaxaca (Oaxaca City; 
Tamazulapam; Huajuapam), Guerrero (Chilpancingo; Omilteme; El 
Limén; Tlapa; Iguala; Sierra Madre del Sur; Tepetlapa; Vente de 
Zopilote; Zumbango del Rio), Puebla (Tebuacan; Atlixco), Morelos 
(Cuernavaca; Yatitepec), Jalisco (Bolafios), and Sonora (Opodepe; 
La Chumata). 
Cyanomyia (?) sordida GouLp, Ann. and Mag. N. H., iv, 1859, 97 (Oaxaca, Mexico; 
coll. J. Gould). 
Cyanomyia sordida SctatER, Proc. Zool. Soc. Lond., 1859, 386 (Oaxaca). 
U[ranomitra] sordida CaBanis and Heine, Mus. Hein., iii, 1860, 41, footnote 
(Oaxaca). 
Phzxoptila sordida Goutp, Mon. Troch., pt. xxii, July, 1861, pl. 340 (vol. v, pl. 
340); Introd. Troch., oct. ed., 1861, 169.—D’Oca, La Naturaleza, ili, 1875, 
210; Troq. de Mex., 1875, 52, pl. (11), fig. 41.—Exzior, Classif. and Synop. 
Troch., 1879, 10.—Ripeway, Proc. U.S. Nat. Mus., iii, 1880, 309 (Oaxaca).— 
Satvin, Cat. Birds Brit. Mus., xvi, 1892, 63 (Sierra Madre del Sur, Chilpan- 
cingo, Tepetlapa, Vente de Zopilote, and Omilteme, Guerrero; Oaxaca).— 
Satvin and Gopman, Biol. Centr.-Am., Aves, ii, 1892, 260 (Bolafios, Jalisco?; 
Cuernavaca, Morelos; Atlixco, Puebla; etc.)—Harrert, Novit. Zool., i, 
1894, 61 (Zumbango del Rio and Chilpancingo, Guerrero).—Bovucarp, Gen. 
Hum. Birds, 1894, 109 (Oaxaca; Puebla)—Hartert (E. and C.), Novit. 
Zool., i, 1894, 19 (Zumbango del Rio and Chilpancingo, Guerrero).—THAYER 
and Banes, Proc. Biol. Soc. Wash., xix, 1906, 18 (Opodepe and La Chumata, 
n.-centr. Sonora). 
[Pheoptila] sordida SctaTeR ahd Satvin, Nom. Av. Neotr., 1873, 93.—Snarre, 
Hand-list, ii, 1900, 110. 
P{haeoptila] sordida Hartert, Das Tierreich, Troch., 1900, 64 (monogr.). 
Leucolia sordida Muusant and VERREAUX, Classif. Troch., 1865, 35. 
[Aylocharis] sordida Gray, Hand-list, i, 1869, 152, no. 1957. 
Doleromya sordida Boucarp, Notes quelques Troch., 1873, 14 (Oaxaca City; 
Atlixco, Puebla; habits); Ann. Soc. Linn. Lyon, xx, 1873, 282 (Atlixco).— 
Mutsant and VERREAUX, Hist. Nat. Ois.-Mouch., i, livr. 3, 1874, 207 (Oaxaca; 
Atlixco; etc.); iv, livr. 3, 1878, 168. 
[Doleromya] sordida Mutsant, Ann. Soc. Linn. Lyon, xxii, 1876, 204. 
Pheoptila zonura Goutp, Introd. Troch., oct. ed., 1861, 170 (Bolafios, Jalisco; 
Loddiges coll.).—D’Oca, La Naturaleza, iii, 1875, 304; Los Colibris Mex., 
1875, 58 (cites fig. 47). 
[Hylocharis] zonura Gray, Hand-list, i, 1869, 152, no. 1958. 
[Doleromya sordida] var. zonura Mutsanr, Ann. Soc. Linn. Lyon, n. s., xxii, 
1876, 204. 
Genus CYNANTHUS Swainson. 
Cynanthus Swainson, Philos. Mag., n.s., i, June, 1827, 441. (Type C. latirostris 
Swainson; see Stone, Auk, xxiv, 1907, 192; Allen, Bull. Am. Mus. N. H., 
xxiii, 1907, 347; xxiv, 1908, 34.) 
