Gen. PACHYMENES, _Sauss._ 1. PACHYMENES VIRIDIS. _P._ laete viridis; facie pube argentato-alba tecta; alis hyalinis. _Female._ Length 8 lines. Bright green; the head, thorax, and basal segment of the abdomen rugose, the rest of the abdomen finely and very closely punctured; the clypeus thinly covered with a fine silvery-white pubescence, its apex produced and truncate. Thorax: the metathorax rounded behind, a deep longitudinal impressed line in the middle, and with fine silvery down at the sides and behind; the wings subhyaline, with a fuscous stain along the anterior margin of the superior pair; the legs rufo-piceous; the coxae, femora, and tibiae more or less tinged with green. _Hab._ Aru. Gen. RHYNCHIUM, _Spin._ 1. Rhynchium mirabile, _Sauss. Mon. Guepes Sol._ 106. 6, t. 14. f. 5 [Symbol: female]. _Hab._ Aru; Tasmania. The _Male_ of this fine species closely resembles the female; it is black, with a transverse spot above the insertion of the antennae, an abbreviated narrow line behind the eyes, another on the lower margin of their emargination; the scape in front and the clypeus yellow, the latter notched at its apex; a minute yellow spot at the base of the mandibles; the antennae, tibiae, apex of the femora, and the tarsi ferruginous; the basal joint of the intermediate and posterior tarsi dusky; the intermediate femora deeply excavated or hollowed beneath; the prothorax yellow above; the metathorax truncate, transversely striated with several minute teeth on the lateral margins; the wings hyaline, tinted with yellow, their apical margins slightly clouded; the apical margins of all the segments of the abdomen bordered with yellow, that on the first segment narrowest. The only particulars in which the female apparently differs from Saussure's description, is that the second fascia on the abdomen is _widest at the sides_, and there are _three little teeth_ on each side of the margins of the metathorax. The _Female_ is also in the Paris Museum. 2. Rhynchium superbum, _Sauss. Mon. Guepes Sol._ p. 113. 18. _Hab._ Aru: New Holland. Our example of this species slightly differs in coloration from the description of Saussure. He says, "black, with the vertex, the front, the prothorax, and the border of all the segments of the abdomen, except the first, yellow; the wings yellow;" in the Aru specimen, the sinus of the eyes, a spot above the clypeus, a reversed crescent-shaped spot crossing the ocelli, two oblique spots behind them, and a broad elongate stripe behind the eyes yellow. These slight differences cannot characterize more than a variety; in every other particular they exactly correspond. Gen. ODYNERUS, _Latr._ 1. ODYNERUS PETIOLATUS. _O._ niger; clypeo apiculato; capite, thorace abdomineque flavo variis; abdomine petiolato; alis subhyalinis.