_Female._ Length 7 lines. Black; the head smooth and shining; the clypeus, the cheeks, and face anteriorly covered with silvery pile; the scape in front, the mandibles, and palpi ferruginous. Thorax: the sides and beneath with a thin silvery-white pile; the legs ferruginous with the coxae black, the posterior pair red beneath; the thorax closely punctured, the metathorax transversely striated; wings fulvo-hyaline, the nervures pale-testaceous. Abdomen shining, very closely and delicately punctured; thinly covered with a fine white silky pile, which is very bright on the margins of the segments, which are slightly rufo-piceous. The _male_ closely resembles the female, and is similarly sculptured and coloured. _Hab._ Celebes. 7. LARRADA FESTINANS. _L._ nigra; facie abdominisque marginibus segmentorum argentato-pilosis. _Female._ Length 3 lines. Black; the face and cheeks thinly covered with silvery pile. Thorax: the disk very closely punctured, the metathorax rugose; the sides and the legs with a fine glittering sericeous pile, the wings subhyaline, their apical margins fuscous, the nervures fuscous. Abdomen smooth and sinning, covered with a thin silky pile, the apical margins with bright silvery fasciae, only observable in certain lights. The _male_ closely resembles the female, but has the face more silvery. _Hab._ Celebes. Genus MORPHOTA, _Smith_. 1. MORPHOTA FORMOSA. _M._ capite thoraceque nigris; abdomine rufo, apice nigro, pilis argentatis ornato. _Female._ Length 5 lines. Black, with the two basal segments of the abdomen red; covered with a brilliant changeable silvery pile, most dense on the face, cheeks, sides of the metathorax, and on the apical margins of the abdominal segments. The mandibles ferruginous, with their apex piceous. The vertex smooth, and having _three distinct ocelli_; the head more produced behind the eyes than in _Larrada_. Thorax: the prothorax subtuberculate at the sides; wings subhyaline and iridescent, the nervures fuscous, the tegulae pale testaceous behind. The apical margin of the first segment of the abdomen rufo-fuscous. _Hab._ Celebes. The insects belonging to the genus _Morphota_ differ from those of _Larrada_ in having three distinct ocelli, the vertex without any depressions, and the head much less compressed than in _Larrada_; the recurrent nervures are received nearer to the base and apex of the second submarginal cell; the species have, in fact, a distinct habit, and do not assimilate with the species of _Larrada_. Genus TACHYTES, _Panz._ 1. TACHYTES MOROSUS. _T._ niger, scutello abdomineque nitidis, facie argenteo-pilosa; marginibus lateralibus abdominis segmentorum argentatis.