1 
BIRDS OF NORTH AND MIDDLE AMERICA. 351 
Immature.—Similar to adults, but greater part (sometimes whole) 
of throat dark sooty brown or dusky, the feathers margined termi- 
nally with grayish white. 
Young.—Similar to the immature plumage, as described above, 
but feathers of upper parts narrowly tipped or margined terminally 
__ with buffy. 
Costa Rica (San José; San Isidro; San Pedro de Mojén; Angostura; 
Corralillo; Orosi; Bols6n; Bebedero; Volcén de Miravalles, up to 2,000 
feet; Tempate; Tenério; Boruca), Nicaragua (Matagalpa; Momo- 
tombo; boundary line between Nicaragua and Honduras, 180 miles 
from Pacific coast), Salvadér (San Salvadér; La Libertad; Volcén 
de San Miguél), and Guatemala (Amatitlin; San Gerénimo; Gualan; 
Toy abaj, Quitché). 
Ornismya constantti DELATTRE, Echo du Monde Savant, 10° ann., ser. 2, vii, no. 
45, June 15, 1843, 1069, in text (Guatemala; coll. A. Delattre; type now in 
coll. Am. Mus. N. H.). 
[Selasphorus. y. Heliomaster] constantiti ReicHEnsBacu, Aufz. der Colibr., 1854, 13. 
[Heliomastes] constantii Bonaparte, Rev. et Mag. de Zool., 1854, 251. 
Heliomastes constanti Mutsant and VERREAUX, Hist. Nat. Ois.-Mouch., ii, livr. 4, 
1876, 269 (Guatemala; Costa Rica); iv, livr. 2, 1877, pl. 57; iv, livr. 3, 1878, 
210 (synonymy). 
Heliomaster constanti Goutp, Mon. Troch., pt. v, May, 1853 (vol. iv), pl. 260; 
Introd. Troch., oct. ed., 1861, 140.—ScLaTER and Savin, Ibis, 1859, 129 
(Guatemala).—Satvin, Ibis, 1860, 263 (San Gerdédnimo, Guatemala).— 
CaBANIS, Journ. fiir Orn., 1862, 164 (Costa Rica).—_Mvu.tsant and VERREAUX, 
Classif. Troch., 1866, 26.—Lawrence, Ann. Lyc. N. Y., ix, 1868, 126 (Costa 
Rica).—Frantzius, Journ. ftir Orn., 1869, 317 (Costa Rica).—Bovcarp, 
Proc. Zool. Soc. Lond., 1878, 69 (San José, Costa Rica).—Euprs-DEsLone- 
cHamps, Bull. Soc. Linn. Normandie, v, 1881, 267. 
H[eliomaster] constantt CaBANIS and Hering, Mus. Hein., iii, 1860, 54 (Costa Rica). 
[Heliomaster] constantt ScLatER and Satvin, Nom. Av. Neotr., 1873, 90.—MuL- 
- sant, Ann. Soc. Linn. Lyon, xxii, 1876, 215. 
[Selasphorus] constantvi RercHENBACH, Troch. Enum., 1855, 11. 
[Trochilus] constantti Gray, Hand-list, i, 1869, 137, no. 1762. 
Floricola constanti Exot, Classif. and Synop. Troch., 1879, 84.—ZELEDON, Cat. 
Aves de Costa Rica, 1882, 20; Anal. Mus. Nac. Costa Rica, 1887, 121 (San 
José).—Satvin, Cat. Birds Brit. Mus., xvi, 1892, 231, 661 (San Gerdénimo, 
Guatemala; La Libertéd, Salvadér; Bebedero, Costa Rica).—SaLvin and 
Gopman, Biol. Centr.-Am., Aves, ii, 1892, 306 (San Salvadér, Volc4n de San 
Miguél, and La Libertéd, Salvadér; Matagalpa and Momotombo, Nicaragua, 
etc.).—CuErnrig, Auk, ix, 1892, 324 (San José, Costa Rica) —Boucarp, Gen. 
Hum. Birds, 1895, 304, part (Guatemala; San José, Costa Rica).—UNDER- 
woop, Ibis, 1896, 442 (Volc4n de Miravalles, Costa Rica).—Lantz, Trans. 
Kans. Ac. Sci. for 1896-97 (1899), 221 (Amatitl4n, Guatemala). 
indeed, in the coloration of the under parts (except throat) they are quite like A. c. 
leocadiz of Mexico. It is possible there may have been an error in ascribing the type 
to Guatemala, for in the dark-colored under parts it is exactly like Costa Rican speci- 
mens and very different from other Guatemalan ones examined; in which case there 
would be three geographic forms of this species: A. c. constantit of Costa Rica and 
Nicaragua, A. c. ? of Guatemala and Salvador, and A. c. leocadix of Mexico. 
