_Female._ Length 5 lines. Black; the clypeus angular in front, its anterior margin and a spot on the mandibles yellow; the antennae rufo-testaceous beneath. Thorax: the anterior margin of the prothorax slightly rebordered; the anterior coxae with a spot in front and two spots on the postscutellum yellow; the anterior and intermediate tibiae beneath, the tarsi beneath and the claw-joint entirely, ferruginous; wings hyaline with a fuscous stain along the anterior margin of the superior pair; the metathorax oblique and slightly concave, with an acute stout tooth on each side. Abdomen: the basal segment campanulate, the petiole short; a narrow yellow fascia on the apical margin of all the segments. _Hab._ Aru. 4. ICARIA BRUNNEA. _I._ rufescenti-fusca; coxis femoribusque obscuris; alis hyalinis. _Female._ Length 3-1/2 lines. Reddish-brown; head and thorax punctured, the abdomen finely rugose; the clypeus and mandibles pale ferruginous, the former with a darker spot in the middle, the anterior margin angular. The anterior margin of the prothorax slightly rebordered; the wings hyaline and iridescent, with a fuscous stain along the anterior margin of the superior pair; the metathorax abruptly truncate. Abdomen: the basal margin of the third and following segments black. _Hab._ Aru. 5. ICARIA GRACILIS. _I._ nigra flavo variegata; abdominis segmento basali elongato, gracili et petiolato; alis hyalinis. _Female._ Length 7 lines. Black; the scape in front, the sides and apical margin of the clypeus, and a spot at the base of the mandibles yellow; the cheeks reddish-yellow; the antennae ferruginous; the head covered with short griseous pubescence. Thorax with obscure ferruginous tints and a short griseous pubescence, most dense on the sides and beneath; the anterior margin of the prothorax, the tegulae, scutellum and postscutellum, a broad stripe on each side of the metathorax, the coxae, and the anterior and intermediate femora, at their apex beneath, yellow; the scutellum with a ferruginous stain in the middle, the postscutellum with a black stain, the coxae ferruginous above, the tibiae and tarsi ferruginous beneath; wings hyaline, with a fuscous stain along the anterior margin of the superior pair. Abdomen: a yellow fascia on the apical margin of the first and second segments; that on the following segments rufo-testaceous. _Hab._ Aru. 6. ICARIA UNICOLOR. _I._ rufescenti-fusca, tenuiter cinereo-pubescens. _Female._ Length 5 lines. Reddish-brown, covered with a thin cinereous pubescence; the clypeus acutely angular anteriorly; the metathorax oblique and delicately striated transversely; wings fusco-hyaline; the petiole of the abdomen long, the segment campanulated and narrow. _Hab._ Key Island. Gen. POLISTES, _Latr._ 1. Polistes tepidus, _Fabr. Syst. Piez._ p. 271. 7. _Hab._ Aru; Key Island; Solomon Islands; New Guinea; Australia. 2. Polistes diabolicus, _Sauss. Mon. Guepes Soc._ 68. 26, t. 6. f. 7. _Hab._ Aru; Java; Timor.