Hab. Aru.
Gen. Larra, Fabr.
1. Larra simillima. L. nigra, pulchre prismatica, maculis fasciisque variis flavis ornata.
Female. Length 6½ lines. Black; the abdomen with tints of blue violet; the thorax slightly prismatic; the labrum, clypeus, an angular scape above, an abbreviated line on the inner orbits of the eyes, the scape in front, and the antennæ beneath, yellow; the cheeks with a silvery reflexion. The thorax beneath, and the metathorax, with a shining white silvery pile; the anterior and intermediate femora and tibiæ beneath yellow; the tarsi pale ferruginous, and more or less fuscous above; wings subhyaline, the nervures fuscous; a spot on the lateral posterior angles of the metathorax, two ovate spots on the scutellum, and a line on the postscutellum yellow. Abdomen: the basal segment with a broadly interrupted fascia a little before its apical margin; the second and fourth segments with a narrow yellow fascia at their apical margins, which is widened laterally; beneath, the second and third segments with a yellow spot on each side.
The Male differs from the female in having a large quadrate black spot on the clypeus, and a spot at the base of the labrum; there is also a narrow yellow line on the posterior margin of the prothorax; and the third segment of the abdomen has a yellow fascia: it is also rather smaller.
Hab. Aru.
This insect very closely resembles Larra prismatica, from Borneo, Malacca, and Celebes, of which it may be a variety.
Gen. Bembex, Fabr.
1. Bembex melancholieca, Smith, Cat. Hym. pt. iv. p. 328; Proc. Linn. Soc. ii. p. 105.
Hab. Aru; Sumatra; Borneo.