Male. Length 7 lines. Black; the head and thorax very closely punctured, thinly clothed with griseous pubescence, that on the face, thorax beneath, and on the coxæ most dense and glittering; antennæ more slender than is usual in this genus, and tapering to their apex, the joints slightly subarcuate; the mandibles bidentate at their apex and with a yellow spot at their base. Thorax: the posterior margin of the prothorax, a spot beneath the wings, the tegulæ, and the postscutellum yellow; the anterior and intermediate tibiæ ferruginous and more or less dusky above, the posterior pair ferruginous beneath. Abdomen shining, the margins of the segments deeply depressed; a small ovate spot on each side of the first segment, the second and three following segments with a narrow stripe on each side in the middle, yellow; the yellow markings obscure; the apical segment coarsely rugose; beneath, the segments are closely and strongly punctured.
Hab. Aru.
Gen. Scolia, Fabr.
Division I. The anterior wings with two submarginal cells and two recurrent nervures.
1. Scolia grossa, Burm. Abh. Nat. Ges. Halle, i. p. 23. (Tiphia grossa, Fabr. Syst. Piez. p. 232. 4.)
Hab. Aru; Java.
The specimens of this species received from Aru are only 9 lines in length; I have examined others from Celebes, Borneo, India, and Java, showing every difference between 9 lines and 18 lines.
Division II. Anterior wings with two submarginal cells and one recurrent nervure.
2. Scolia nitida. S. nitida, aterrima; alis æneo et violaceo splendidè micantibus.
Female. Length 11 lines. Shining jet-black, the abdomen with prismatic tints. The flagellum fusco-ferruginous beneath, the mandibles ferruginous at their apex; the wings dark brown with a splendid lustre of coppery and golden tints mixed with shades of violet. The head with a few punctures behind the ocelli; the thorax with scattered punctures; the metathorax finely but not closely punctured; the disk of the mesothorax impunctate; the abdomen with fine scattered punctures; the apical segment opake, rugose, and with its apical margin pale testaceous; the abdomen beneath with strong distant punctures.