BIRDS OF NORTH AND MIDDLE AMERICA. 351 



Immature. — Similar to adults, but <i;reater part (sometimes whole) 

 of throat dark sooty brown or dusky, the feathers marpjined 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 Jose ; Sanlsidro; San Pedro de Moj(5n; Angostura; 

 Corrahllo; Orosi; Bolson; Bebedero; VolcandeMiravalles, up to 2,000 

 feet; Tempate; Tenorio; Boruca), Nicaragua (Matagalpa; Momo- 

 tombo; boundary line between Nicaragua anil Honduras, ISO miles 

 from Pacific coast), vSalvador (San Salvador; La Libertad; Volcan 

 de San Miguel), and Guatemala (Amatitlan; San Geronimo; Gualan; 

 Toyabaj, Quitche). 



Ornismya constantii 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] constantii Reichenbach, Aufz. der Colibr., 1854, 13. 



[Heliomastes] constantii Bonaparte, Rev. et Mag. de Zool., 1854, 251. 



Heliomastes constantilsiv'LSA.'S'x: and. Verreaux, Hist. Nat. Ois.-Mouch., ii, livr. 4, 

 1876, 269 (Guatemala; Costa Rica); iv, livr. 2, 1877, pi. 57; iv, livr. 3, 1878, 

 210 (synonymy). 



Heliomaster constanti Gould, Mon. Troch., pt. v. May, 1853 (vol. iv), pi. 260; 

 Introd. Troch., oct. ed., 1861, 140.— Sclater and Salvin, Ibis, 1859, 129 

 (Guatemala). — Salvin, Ibis, 1860, 263 (San Geronimo, Guatemala). — 

 Cabanis, Journ. fiir Orn., 1862, 164 (Costa Rica).— Mulsant and Verreaux, 

 Classif. Troch., 1866, 26.— Lawrence, Ann. Lye. N. Y., ix, 1868, 126 (Costa 

 Rica). — Frantzius, Journ. fiir Orn., 1869, 317 (Costa Rica). — Boucard, 

 Proc. Zool. Soc. Lond., 1878, 69 (San Jose, Costa Rica). — Eudes-Deslong- 

 CHAMPS, Bull. Soc. Linn. Normandie, v, 1881, 267. 



H[elinmaster] constanti Cabanis and Heine, Mus. Hein., iii, 1860, 54 (Costa Rica). 



[Heliojuaster] constanti Sclater and Salvin, Nom. Av. Neotr., 1873, 90. — Mul- 

 sant, Ann. Soc. Linn. Lyon, xxii, 1876, 215. 



[Selas-phorus] constantii Reichenbach, Troch. Enum., 1855, 11. 



[Trochilus] constanti Gray, Hand-list, i, 1869, 137, no. 1762. 



Floricola constanti Elliot, Classif. and Synop. Troch., 1879, 84. — Zeledon, Cat. 

 Aves de Costa Rica, 1882, 20; Anal. Mus. Nac. Costa Rica, 1887, 121 (San 

 Jose).— Salvin, Cat. Birds Brit. Mus., xvi, 1892, 231, 661 (San Geronimo, 

 Guatemala; La Libcrtdd, Salvador; Bebedero, Costa Rica). — Salvin and 

 GoDMAN, Biol. Centr.-Am., Aves, ii, 1892, 306 (San Salvad6r, Volcdn de San 

 Miguel, and La Libertdd, Salvador; Matagalpa and Momotombo, Nicaragua, 

 etc.). — Cherrie, Auk, ix, 1892, 324 (San Jose, Costa Rica).— Boucard, Gen. 

 Hum. Birds, 1895, 304, part (Guatemala; San Jose, Costa Rica). — Under- 

 wood, Ibis, 1896, 442 (Volcan de Miravalles, Costa Rica).— Lantz, Trans. 

 Kans. Ac. Sci. for 1896-97 (1899), 221 (Amatitldn, Guatemala). 



indeed, in the coloration of the under parts (except throat) they are quite like A. c. 

 leocadix 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. constantii of Costa Rica and 

 Nicaragua, A. c. ? of Guatemala and Salvador, and A. c. leocadix of Mexico. 



