(Thraupidae; Ϯ Yellow-faced Grassquit T. olivaceus) Gr. τιαρις tiaris  tiara  < τιαρα tiara  tiara, head-dress; "G. TIARIS.  Swains. in Zool. Journ. No. 10.   73. Tiaris pusillus.  Olive; crown, ears, throat and breast blackish; eye-stripe and chin golden yellow.  Table land. Temiscaltipec. Real del Monte.  A variety, or probably a young bird of this species now before me, differs in having the black confined to a narrow margin bordering the yellow spots." (Swainson 1827 (June)); "Leaving the genus Ploceus, of which the foregoing are the the most prominent forms, we come to the American group of Tiaris, a small assemblage of pretty little birds, most of which, as the name implies, are crowned with crests" (Swainson 1837).
Synon. Euetheia.
● (syn. Charitospiza Ϯ Coal-crested Finch C. eucosma) "TIARIS.  ...  Bill thick, conic, acute, slightly notched. Wings rather short, rounded; the second, third, fourth, and fifth quills nearly equal and longest. Tail rounded.  Type. Fringilla ornata. Temm., Pl. col. No. 208" (Swainson 1827 (December)).

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).