Psectrosciara brevicornis, Johannsen, 1946

Johannse, O. A., 1946, Some New Species Of Nemocerous Diptera From Guam, Insects of Guam II, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 187-193 : 188

2. Psectrosciara brevicornis , new species (fig. 1, f, g).

Female: head and thorax black, subshining; antennae (fig. 1, g) blackish, pubescent, shorter than the head, nine-segmented, the apical segment a third longer than wide. Eyes broadly contiguous, lower ocellus nearly twice its diameter above the level of the upper margin of the eye; eyes with a short and delicate seta, less in length than the diameter of a facet, placed at.each facet angle, best seen in a slide mount. Palpi short, apparently one-segmented. Abdomen black, subshining, becoming more brownish posteriorly, pubescent. Wings clear hyaline, radial veins blackish, the other veins colorless; venation as figured (figure 1, f); subcosta and anal vein delicate, the others sharply defined; base and tip of the anterior branch of the media distinct, though somewhat weak; apex of anterior branch of cubitus obliterated. Microtrichia coarse, macrotrichia lacking in the 'costal cell and the basal part of the radial cell, elsewhere, including on the veins, sparsely but well distributed. Halteres dark. Legs more or less yellowish brown; strong; tibiae slender at base gradually broadening toward tip, in the hind leg three times as broad apically as at base. Basitarsi approximately twice as long as the following segment. Proportions of the hind leg segments in the ratio 40:40:18:10:8:5:8. Length 1.6 mm., of wing 1.07 mm., measured from the humeral crossvein, of the antenna 0.25 mm.

Sumay , June 22, 1936, Swezey.

Holotype in the Cornell University collection; paratype in the Experiment Station , Hawaiian Sugar Planters' Association.

This species resembles P. niahensis Kieffer from the Seychelles, but differs slightly in wing venation, in having nine instead of 10 antennal segments, and a distinctly shorter terminal segment. Kieffer's statement as to the number of antennal segments in P. mahensis has been corrected by Enderlein (1912).