2. Thynnus (Agriomyia) vagans ^HNS.

T. niger, capite thoraceque flavo variegatus, abdominis segmentis maculis duabus flavis; alis sub-hyalinis.

Male. Length 6 1 / 2 lines. Black, the head and thorax subopake, the abdomen shining; the mandibles, clypeus and a V-shaped mark above yellow; the base of the clypeus and an anchor-shaped mark in the middle black. Thorax, the collar, posterior margin of the prothorax, a spot on the tegulae, two beneath the wings, a minute one on the mesothorax, three on the scutellum, and one on each side of the metathorax yellow; the anterior tibiae and the intermediate pair in front ferruginous; the wings subhyaline, the nervures black. The abdomen has an oblong yellow spot at the sides of all the segments except the two apical ones.

Female. Length 4 lines. Apterous; black, the head small, transverse in front, much narrowed behind, with a deep longitudinal sulcation on each side close to the margin of the eyes. The thorax narrow and oblong. Abdomen oblong-ovate, very large, with four deep transverse grooves on the second segment. (Pl. I. fig. 1 [[male]], 2 [[queen]].)

Hab. Gilolo.