Fam. EUMENIDAE, _Westw_. Genus ZETHUS, _Fabr._ 1. Zethus cyanopterus, _Sauss. Mon. Guepes Sol_. i. 23. 2. Genus MONTEZUMIA, _Sauss._ 1. Montezumia Indica, _Sauss. Mon. Guepes Sol._ i. _supp._ 167. 59. t. 9. f. 4. _Hab._ India, Celebes. Genus RHYNCHIUM, _Spin._ 1. Rhynchium haemorrhoidale, _Sauss. Mon. Guepes Sol._ i. 109. 12. Vespa haemorrhoidalis, _Fabr. Syst. Piez._ p. 259. 28. _Hab._ India, Java, Cape of Good Hope, Celebes. 2. Rhynchium argentatum, _Sauss. Mon. Guepes Sol._ i. 115. 22. Vespa argentata, _Fabr. Syst. Piez._ p. 260. 39. _Hab._ India, Celebes. 3. Rhynchium atrum, _Sauss. Mon. Guepes Sol._ i. 109. 11. _Hab._ India, Celebes. 4. Rhynchium parentissimum, _Sauss. Mon. Guepes Sol._ p. 111. 14. Var. _R. haemorrhoidale?_ _Hab._ India, Java, Celebes. Genus EUMENES. 1. Eumenes circinalis, _Fabr. Syst. Piez._ p. 286. 4. _Hab._ India, Sumatra, Celebes. 2. Eumenes fulvipennis, _Smith, Cat. Hym. Ins._ pt. v. 24. 26. _Hab._ Celebes. 3. EUMENES VINDEX. _E._ niger, flavo variegatus, alis subhyalinis iridescentibus. _Male._ Length 6 lines. Black; strongly punctured and shining; a minute spot behind the eyes, another in their emargination, the clypeus, with two minute spots above it, a spot at the base of the mandibles, and the scape in front yellow. Thorax: a subinterrupted line on its anterior margin, the tubercles, a spot on the tegulae behind, and the legs yellow; the coxae, femora at their base, and the posterior tibiae outside dusky; wings light brown and iridescent, the anterior margin of the superior pair darkest. Abdomen delicately punctured; the apical margin of the first segment with a narrow yellow border slightly interrupted on each side; the apical segments with a thin cinereous pile. _Hab._ Celebes. 4. EUMENES ARCHITECTUS. _E._ niger, clypeo, prothoracis margine postscutello abdominisque segmenti primi margine flavis. _Female._ Length 6 lines. Black and closely punctured; a line behind the eyes near their vertex, a spot between the antennae and the clypeus, yellow; the latter black at the apex, which is notched; the labrum and mandibles reddish-yellow, the latter black at their base. Thorax: the anterior margin yellow; the tubercles, tegulae, postscutellum, an interrupted line on each side of the metathorax, the tibiae, tarsi, and femora at their apex, yellow; the coxae spotted with yellow and the posterior tibiae dusky; the wings fusco-hyaline; a black line across the tegulae. Abdomen: an ovate spot on each side of the petiole, its apical margin, a transverse ovate spot on each side of the first segment, and its posterior margin yellow; the following segments covered with a grey silky pile. _Male._ Differs from the female in having the clypeus entirely yellow, the metathorax and abdomen entirely black; only the apical margin of the petiole is yellow, it is also longer. _Hab._ Celebes. 5. EUMENES FLORALIS. _E._ niger; clypeo flavo; thorace pedibusque ferrugineo-flavo variegatis.