Orthezia Californica, sp. n.—Female about 4½ mm. long3½ mm. broad, and 2 mm. high. Body flat, very firm, and covered with thick lamellæ of a light brown colour. Margin beset with broad wax lamellæ, which grow larger caudad, ending in two, which form a shield-like process. There are three shield-like lamellæ on the anteriro part of teh dorsum; candad of these is a deep carina, formed by two rows of lamellæ running parallel and ending at the caudal shield-like process.