366 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Adult female——tLength (skin), 110; wing, 66.5; tail, 43; cul- 
men, 22.5.% 
Guatemala (mountains of Vera Paz; Choctfim; Cantodéloc; Tele- 
man), British Honduras (Belize River; Cayo; San Felipe), Hon- 
duras (Santa Ana; San Pedro Sula), and eastern Nicaragua (Los 
Sabalos). 
Trochilus cuviert DELATTRE and Bourcier, Rev. Zool., 1846, 310, part (Tele- 
man, Guatemala). 
Phaeochroa cuvieri Boucarp, Gen. Hum. Birds, 1895, 353, part (Guatemala). 
Aphantochroa robertt Satvin, Proc. Zool. Soc. Lond., 1861, 203 (tierra caliente 
of Vera Paz, e. Guatemala; coll. O. Salvin); Ibis, 1861, 354 (Guatemala; 
crit.).—Hz1neg, Journ. fiir Orn., 1863, 178. 
Aphantocrhoa roberti MULSANT and VERREAUX, Hist. Nat. Ois.-Mouch., i, livr. 2, 
1874, 138 (mts. of Vera Paz, Guatemala). 
[Aphantochroa] roberti Stuon, Cat. Troch., 1897, 9. 
Al[phantochroa] roberti Hartert, Das Tierreich, Troch., 1900, 37 (monogr.). 
Campylopterus roberti GouED, Mon. Troch., pt. xxiii, Sept., 1861, pl. 53 (vol. ii, 
1861, pl. 53)—Mutsant and Verreavx, Classif. Troch., 1866, 22.—Exxior, 
Classif. and Synop. Troch., 1879, 28 —Ripeway, Proc. U. 8. Nat. Mus., iii, 
1880, 310 (Chocttiim, Vera Paz, Guatemala). 
Phzochroa robertt Goutp, Introd. Troch., oct. ed., 1861, 55.—Mutusant, Ann. 
Soc. Linn. Lyon, xxii, 1876, 202.—Nurtine, Proc. U. 8. Nat. Mus., vi, 
1884, 406 (Los Sd&balos, Nicaragua) —Ripeway, Proc. U. 8. Nat. Mus., xiv, 
1891, 471 (San Pedro Sula and Santa Ana, Honduras).—Satvin, Cat. Birds 
Brit. Mus., xvi, 1892, 300 (San Felipe, Belize R., and Cayo, Brit. Hon- 
duras; Choctum and Cantodloc, Guatemala)—Satvin and Gopman, Biol. 
Centr.-Am., Aves, ii, 1892, 326.—Lantz, Trans. Kansas Ac. Sci. for 1896-97 
(1899), 221 (Cayo, Brit. Honduras). 
[Phxochroa] robertt ScLaTER and Satvin, Nom. Av. Neotr., 1873, 80. 
[Polytmus] robertt Gray, Hand-list, i, 1869, 125, no. 1574, 
Genus PHA4{OPTILA Gould. 
Pheoptila 6 Goutp, Mon. Troch., v, July, 1861, text to pl. 340; Introd. Troch., 
oct. ed., 1861, 169. (Type, Cyanomyia(?) sordida Gould.) 
Similar to Cynanthus but tail relatively longer, feet relatively 
stouter, under parts brownish gray in both sexes, and coloration of 
upper parts very dull. 
Bill much longer than head, depressed, broad at base, faintly 
decurved; culmen broadly rounded but contracted into a narrow 
ridge basally; tomia smooth; both maxilla and mandible with a 
narrow lateral median sulcus, that of the former indistinct, however. 
Nasal operculum broad, tumid, unfeathered, the frontal feathering 
forming a transverse line across base of forehead. Tarsus slender, 
with upper portion feathered; anterior toes about equal in length, 
the hallux slightly shorter, all the toes.slender, with claws relatively 
small. Wing less than three times as long as exposed culmen, the 
@ One specimen. b Paioc, obscurus et xtédov, pluma. (Gould.) 
