HELIOTHRYX

(Trochilidae; Ϯ Black-eared Fairy H. auritus) Gr. ἡλιος hēlios  sun; θριξ thrix, τριχος trikhos  hair; a Nahuatl name huitzilin for the hummingbird meant 'tresses-' or 'rays-of-the-sun'; "Heliothryx.   Arten. 1. Tr. auritus Gm.    2. — petasophorus P. M.   3. — scutatus Natter.   Hieher werden vielleicht alle die Arten zu stellen seyn, den denen der Edelsteinglanz des Gefieders an den eigenthümlich gebildeten Federn hinter dem Ohre hervortritt." (Boie 1831); "Heliothryx Boie, Isis von Oken, 1831, col. 547. Type, by subsequent designation, H. aurita (L.) = Trochilus auritus Gmelin. (G. R. Gray, List Gen. Bds., 1840, p. 14.)" (Peters 1945, V, 126). 
Var. Heliotryx, Heliothrix, Heliothrys, Heliotrix, Heliotrys.

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 18 January 2019).