ERIOCNEMIS

(Trochilidae; Ϯ Coppery-bellied Puffleg E. cupreoventris) Gr. εριον erion  wool; κνημις knēmis, κνημιδος knēmidos  boot, legging. Reichenbach's 1849, plate XL, labelled Trochilinae. Mellisuginae. Phaetorninae, clearly shows the fluffy tarsal tufts typical of these hummingbirds; "The sexes are very much alike, and both have the white muff-like decoration on the leg, but it is not so much developed in the female as in the male" (Gould 1861); "Eriocnemis Reichenbach, Av. Syst. Nat. [1849], pl. xl. Generic details only, no species. Type, by subsequent designation, Eriopus simplex Gould = Trochilus cupreo-ventris Fraser (Gould, Monogr. Trochil. pt. 3, 1852, pl. [8] and text)." (Peters 1945, V, 108).   
Var. Eriocnemys, Euryocnemis.   
Synon. Aline, Derbyomyia, Engyete, Erebenna, Eriona, Eriopus, Luciania, Mosqueria, Nania, Niche, Phemonoe, Pholoe, Threptria, Vestipedes.

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 17 December 2018).