(syn. Psilopogon Ϯ Brown-headed Barbet P. zeylanicus) Gr. θερος theros summer, hot season; κηρυξ kērux, κηρυκος kērukos herald; "Nearly allied to Megalæma, but distinguished by the want of the bright red under tail-coverts, by the whole head, neck, and breast being brown with paler striæ, by having a somewhat differently shaped bill, lower at the base, and by the nostrils being free from plumes, is the group so often mentioned as section c of the Monograph. For this I propose the name Thereiceryx *, the type being Bucco zeylanicus, Gmel. ... * "Herald of the hot season": θερος, summer, the hot season; and κηρυξ, a herald. The loud notes of these birds are constantly uttered just before and during the hot season" (Blanford 1893). Var. Thereoceryx.