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Show 310 LORD WALSINGHAM ON [Feb- l5> tends in a strong streak from the base to beyond the middle, and is diffused in the form of ill-defined lines upwards and outwards to the middle of the costa and to the apical margin. In some specimens the costa is touched with whitish on its extreme edge before the middle. Cilia reddish brown. Hind wings and cilia very pale grey. Expanse 19-21 millim. Twenty-six specimens, Shasta county, California, July 28, 1871. EUCERATIA, gen. nov. Capilli hirsuti. Ocelli nulli. Palpi maxillares nulli. Palpi labiates longe porrecti, hirsute vestili, articulo secundo supra fioccoso, tertio basi incrassato, quam secundus paulo longiore. Antenna? pubescentes, articulis alternis aliquid incrassatis. Ala? antica? costa paulum arcuata, ampla?, margine apicali obliquo, angulo anali subconspicuo. Ala? postica? plena?, ciliis longis, apice vix acuminato. Head and face rough with tufts of long scales projecting forwards and upwards. Ocelli none ; maxillary palpi none. Antennae pubescent, slender; basal joint somewhat enlarged, the alternate joints slightly thickened by groups of appressed scales above. Palpi straight, projecting three times the length of the head in front, hirsute, with the first joint small; second scarcely thickened, tufted, especially on its upperside, with long bristling scales projecting forwards ; third rather longer and slightly more slender than the second, enlarged at the extreme base, also roughly clothed, having a tendency to turn outwards as in Topeutis (Zeller). Fore wings ample, with the costa slightly arched, the apical margin oblique, the apex extended, and the anal angle not well defined. EUCERATIA CASTELLA, sp. nov. (Plate XXXV. fig. 13, 13a, 36, 13c, 13d.) Capite et thorace albis; antennis albis, fusco supra maculatis; palpisporrectis, hirsutis, albis, fisco adspersis; a/is anticis albis, squamis brunneo-fuscis sparse irroratis, ciliis albis fusco terminatis; alis posticis dilute brunneo-fuscis, ante medium albidis, ciliis albis; anticis infra dilute brunneo-fuscis, albo marginatis ; posticis infra albidis paulo fuscescentibus. Head, face, and thorax white. Antennae pubescent, white, conspicuously dotted above with brownish fuscous beyond the base, tinged with brownish fuscous beneath. Palpi projecting nearly three times the length of the head beyond it, with the first joint small, second joint scarcely thickened, tufted; apical joint of even size, slightly longer than the second, white, clothed with long coarse scales, most of which, especially at the sides and beneath, are tipped with brownish fuscous, the tuft on the second joint and the apical joint itself having a tendency to turn outwards as in the genus Topeutis, Zell. Fore wings white, sparsely irrorated with distinct brownish fuscous scales; cilia white, tipped with brownish fuscous. Hind wings white at the base and about the abdominal margin, shading off into |