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Show 534 LORD WALStNGHAM ON THE [Nov. 17, TRICHOSTIBAS SORDIDATA, Z. Trichostibas sordidata, Z. Hor. Soc. Ent. Ross. xiii. pp. 233-(1877). West Indies-Portorico (Z.). TRICHOSTIBAS ? IOPHLEBIA, Z. Trichostibas iophlebia, Z. Hor. Soc. Ent. Ross. xiii. pp. 228-9, pi. iii. fig. 69 (1877). West Indies-Antilles (Z.). If the neuration, which is partly given in the figure, is correct, this species cannot be a Trichostibas, but must be allied to Cydosia nobilitella, Cram., the type of Smith's Cgdosiina?, which would necessitate its removal from the Tineidce. BVTALIUM. AUXIMOBASIS, gen. nov. (uvtjpos - promoting growth; fidais = the base.) Type, 3 2 Auximobasis persimilella, Wlsm. Antennae with the basal joint enlarged, flattened, not notched, with a small pecten in front. Maxillary palpi small. Labial palpi smooth, recurved to the top of the head ; apical joint slender, more than half the length of the second joint. Haustellum scaled. Head smooth. Thorax stout, smooth. Fore wings elongate, lanceolate, slightly rounded at the apex, costal margin nearly straight, dorsal margin bulged at the base, straight beyond. Neuration : 12 veins; 2, 3, and 4 very short; 7 and 8 form a common stem to above apex. Hind wings nearly as wide as the fore wings ; lanceolate, tapering outwards, widest at the abdominal margin ; cilia long. Neuration : 8 veins ; 3 from the lower angle of cell, 4 and 5 forked out of 3 from near its base ; 6 and 7 separate. Legs : hind tibiae densely clothed. AUXIMOBASIS PERSIMILELLA, sp. n. (Plate XLI. fig. 9, a-c). Antenna? cinereous, basal joint hoary. Palpi cinereous, stained with fuscous externally nearly to the apex of the second joint. Head hoary cinereous. Thorax hoary cinereous. Fore wings hoary cinereous, sprinkled with fuscous scales ; an ill-defined slightly outcurved fuscous band scarcely before the middle of the wing from the costal to the dorsal margin ; a pair of fuscous |