Lewis Short
(adjective) : blattārĭus, a, um, 1. blatta
* Pertaining to the moth: balnea, for moths, i. e. dark bathing-rooms (so called from the dislike of the moth to the light), Sen. Ep. 86, 7; cf. Plin. 11, 28, 34, § 99.
* Subst.: blattārĭa, ae, f. (sc. herba), moth-mullein: Verbascum blattaria, Linn.; Plin. 25, 9, 60, § 108.
Charlton T. Lewis, Charles Short, A Latin Dictionary