AMAZILIA, 317 
America and eastern Mexico, north to southern Texas, south to 
western Ecuador. 
438. A. fuscicaudata (Fraser). Rieffer’s Hummingbird. 
c. Belly and flanks cinnamon-rufous, cinnamon, or ochraceous; outer tail- 
feather entirely rufous, except sometimes a narrow margin (of dull 
bronzy) to outer web; upper tail-coverts chiefly green or bronzy ; 
tail light chestnut, or chestnut-rufous, the feathers (except outer) 
broadly margined terminally with bronzy or violet-dusky, the 
middle feathers sometimes entirely bronzy or violet-dusky. 
d'. Lower breast, belly, sides, and flanks pale cinnamon, or cinnamon- 
buff, not abruptly defined against green of more anterior por- 
tions; length about 4.00-4.50, wing 2.15-2.30, tail 1.50-1.70, 
exposed culmen .70-.80. Hab. Eastern Mexico, north to lower 
Rio Grande Valley in Texas. 
439. A. cerviniventris GouLp. Buff-bellied Hummingbird. 
d’. Lower breast, belly, sides, and flanks deep cinnamon, or cinnamon- 
rufous, abruptly contrasted with green of more anterior por- 
tions; wing 2.20-2.25, tail 1.40-1.60, exposed culmen .70. Hab. 
Yucatan. 
A. yucatanensis (CaBoT). Cabot’s Hummingbird. 
b%. Secondaries rufous or chestnut at base. 
c. Tail mainly chestnut, or rich purple-bronze. 
d'. Outer webs of quills (except longer ones) chiefly chestnut or 
rufous; secondaries chestnut or rufous tipped with dusky; 
outer tail-feathers deep chestnut; wing 2.10-2.20, tail 1.30- 
1.40, exposed culmen .70-.80. Hab. Southern Mexico, north to 
Jalapa, Chihuahua, and Sonora. 
A. beryllina (Licut.). Berylline Hummingbird? 
d@. Outer webs of quills with rufous only at extreme base, and some- 
times concealed or nearly obsolete; secondaries dusky for at 
least terminal half of exposed portion; outer tail-feathers very 
dark chestnut, bordered terminally with bright purple or 
bronze; middle tail-feathers usually richer bronze or purple 
than in A. beryllina; wing 2.10-2.25, tail 1.30-1.40, exposed 
culmen .65-.78. Hab. Guatemala. 
A. devillii (Bourc.). Maria’s Hummingbird.$ 
ce. Tail neither chestnut nor purple-bronze. 
d@', Tail greenish bronze. Hab. Mexico. 
A. ocai GouLp. D’Oca’s Hummingbird.‘ 
1 Trochilus yucatanenais Canot, Proc. Nat. Hist. Soc. Bost. 1845, 74. Amazilia yucatanensis GouLD, Mon. 
Troch. pt. xxiii. 1861 (vol. v. 1861, pl. 308). 
2 Trochilus beryllinis Licat., Preis-Verz. 1830, No. 26. Amazilia beryllina Gounp, Mon. Troch. pt. xxii. 
1861 (vol. v. 1861, pl. 312). 
8 Trochilus devillit Bourc., Rev. Zool. 1848, 272. Amazilia devillit Rzicn., Auf. der Colib. 1854, 10. 
4 Amazilia ocai GouLp, Ann. Mag. N. H. ser. 3, iv. 1859, 96; Mon. Troch. v. 1861, pl. 289. 
