(Parulidae; Ϯ Flame-throated Warbler O. gutturalis) Gr. ορος oros, ορεος oreos mountain (i.e. Volcán Irazú, Costa Rica); θλυπις thlupis unidentified small bird, perhaps some sort of finch or warbler. In ornithology thlypis signifies either a thin-billed tanager or, as in this case, a parulid warbler. "Two Central American species, which have been usually referred to this genus, cannot properly be included; in fact, they apparently are much nearer the genus Conirostrum (assigned in the existing 'system' to the Cœrebidæ) than to Compsothlypis. From the latter they differ in having no trace whatever of the notch to the bill, and in the very slight development of the rictal bristles, both of which features are characters of Conirostrum. There are also other differences, which it is unnecessary to mention in the present connection. I do not believe, however, that these birds can be consistently placed in Conirostrum, the bill being much stouter, while there are other differences. It therefore seems desirable to give a new name to this group (the two species being apparently congeneric), and I accordingly propose that of Oreothlypis, with Compsothlypis gutturalis Cab. as type" (Ridgway 1884).