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Show 780 MR. H. DRUCE ON NEW HETEROCERA. [DeC 19, thorax spotted with black. Abdomen yellow above, black on the underside. Expanse 2\ inches. Hab. East Africa, Nyassa ( Thelwall). This beautiful species is allied to H. bellatrix, Dalman, from South Africa. Fam. NYCTEMERIDiE. N Y C T E M E R A , Hiibner. N Y C T E M E R A ACR/EINA, n. sp. Primaries dusky brown ; the nerves all black, except on the white band which crosses the wings from about the middle of the costal margin nearly to the anal angle. Secondaries-the basal half pure white, the outer half yellowish brown, shading to dark brown on the costal margin. Antennae black. Head, thorax, and upperside of abdomen brown ; underside yellow. Expanse 3 inches. Hab. West Africa, Calabar. I at first thought that this species would be better placed in the genus Aletis; but on comparing the neuration with specimens of Nyctemera apicalis which 1 have had mounted in Canada balsam, I find that it is the same. This and the following species are the two largest described in this genus. At first sight the)* might easily be taken for Acraa. NYCTEMERA CHROMIS, n.sp. (Plate LXI. fig. 2.) Closely allied to the preceding species. The primaries the same, only slightly more yellow. Secondaries chrome-yellow, shading to pale brown on the outer margin. Underside the same as above. Head and thorax black. Abdomen brown above ; underside yellow. Expanse 2-J inches. Hab. West Africa (Thomson). OTROEDA, Walker. O T R O E D A VARUNiEA, 11. Sp. Primaries pale chrome-yellow, partly crossed by two black bands, broadest on the costal margin, tapering to a point near the anal angle ; apex broadly black ; a submarginal row of five white spots, the first two the largest. Secondaries pale chrome-yellow, the outer margin black, with a submarginal row of white spots. Underside the same as above. Head black. Thorax and abdomen yellow. Expanse 2-| inches. Hab. West Africa, Congo. This species is allied to Otroeda vesperina of Walker. It is a much smaller and more pale-coloured insect. |