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Show 92 MR. R. TRIMEN ON BUTTERFLIES [Jan. 20, than tibia and ending in a long slightly-curved acute claw, in female as thick as tibia and like the other tarsi except that the first joint is shorter. Abdomen of moderate length, slender, laterally compressed, arched, acuminate. The structural characters italicized in the above diagnosis are those that mainly distinguish this new genus from Zeritis; but the whole aspect, notwithstanding similarity of colouring and to a less extent of marking, is very different from that of the latter genus, and resembles that of the small Acrcece represented by A. serena, Fabr. Though much more normal as a Lycsenid than such aberrant African genera as Deloneura and Lachnocnema, Erikssonia exhibits considerable divergence from the typical groups of the family, and is probably best placed between Zeritis and Mimacrcea, but nearer to the former than to the latter. 77. ERIKSSONIA ACR^INA, n. sp. (Plate IX. figs. 18 8> 19 $, 20 cf.) Exp. al. (8) I in. 1|-4| lin.; ( ? ) 1 in. 6 lin. 8 . Varying from pale to deep fulvous-ochreous, with narrow fuscous marginal borders. Fore wing : a moderately broad costal border, commencing before first third of wing, becoming gradually wider to apex, but very deeply excavated by the ground-colour a little before apex; a terminal narrow elongate transverse discocellular fuscous mark joined to costal border (in one of the larger examples almost obsolete); some of the underside markings, consisting of two discocellular dark spots and a discal and a sub-marginal series of dark spots, indistinctly traceable; hind-marginal border, below apical costal expansion, evenly narrow to posterior angle, its inner edge emitting short nervular dentations; cilia pale ocbre-yellow, with two or three rather indistinct dark nervular interruptions along upper half of wing. Hind wing: hind-marginal border without internal dentations, narrower than in fore wing, except at apex, where there is a considerable fuscous expansion much like that in fore wing ; from the lower inner corner of this expansion there runs (in the two paler smaller examples) a somewhat sinuated, slightly tapering, outwardly denticulated, submarginal fuscous streak, the extremity of which is curved to join that of hind-marginal border at anal angle ; in one of the two large examples only the very commencement of this streak is distinct, in the other the whole streak is wanting and the apical dark marking is much reduced. Cilia long, creamy, with regular narrow nervular fuscous interruptions. UNDERSIDE.-Paler and duller than upperside,varying (in accordance with tint of upperside) from pale dull ochre-yellow in the two smaller examples to pale fulvous-ochreous in the two larger ones; in both wings-three discocellular black spots (one terminal), an irregular discal row of smaller black spots, a submarginal black streak (submacular in fore wing) bearing along its inner side a sub-macular glittering-silvery streak, and a hind-marginal well-marked black edging line, immediately preceded by a creamy one (the latter |