_Male._ Length 4 lines. Brassy, with tints of green on the clypeus, metathorax, and thorax beneath; the head and thorax very closely and finely punctured; the clypeus produced and highly polished; the mandibles rufo-testaceous, the antennae as long as the head and thorax. Thorax: the wings hyaline and splendidly iridescent, the tegulae and the tarsi rufo-testaceous. Abdomen closely punctured, the apical margins of the segments smooth and shining; the head and thorax above with a pale fulvous pubescence, that on the sides of the metathorax and legs pale and glittering; the abdomen has a pale scattered glittering pubescence. _Hab._ Aru. 3. NOMIA DENTATA. _N._ nigra et punctata, facie metathoracisque lateribus cinereo-pubescentibus, postscutello medio unidentato. _Mas._ antennis filiformibus longitudine thoracis. _Female._ Length 5 lines. Black; head and thorax rather finely punctured; the face covered with short cinereous pubescence; the clypeus naked and much produced, the anterior margin and the tips of the mandibles ferruginous; the cheek with long whitish pubescence. Thorax: the sides of the metathorax, the floccus on the posterior femora and the postscutellum with whitish pubescence, the latter produced in the middle into a blunt tooth; the legs fusco-ferruginous, with the anterior tibiae and apical joints of the tarsi brighter; wings hyaline and iridescent. Abdomen shining and punctured, the apical margins of the two basal segments broadly depressed, and more finely and closely punctured than the rest; the apical margins of the second, third, and fourth segments pale testaceous; the apical margins of the two basal segments narrowly fringed with white pubescence, usually more or less interrupted in the middle. _Male._ Resembles the female very closely, but has the face much more pubescent; the antennae filiform and longer than the head and thorax; the scutellum armed at its posterior lateral angles with an acute tooth; the metathorax truncate and slightly concave, its base with short longitudinal grooves, the lateral margins fringed with long pubescence. _Hab._ Aru. Subfam. DASYGASTRAE. Gen. MEGACHILE, _Latr._ 1. MEGACHILE LATERITIA. _M._ nigra, abdomine pube ferruginea vestito, alis fuscis. _Female._ Length 8 lines. Black; head and thorax very closely and finely punctured; the mandibles with a single blunt tooth at their apex; the anterior margin of the clypeus transverse. Thorax: the wings brown, the posterior pair palest, their base subhyaline. Abdomen clothed with bright brick-red pubescence above and beneath; the basal segment with bright yellow pubescence above. _Hab._ Aru. 2. MEGACHILE SCABROSA. _M._ nigra, metathorace antice rude scabrato, abdomine subtus nigro-pubescente.