The Philippine journal of science. [Vol. 67, no. 1]

162

The Philippine Journal of Science

1938

eluding ventral anepisternum, sternopleurite, and meron more
infuscated. Halteres yellow. Legs with coxae yellow, fore coxe
a trifle darker; trochanters yellow; remainder of legs yellow,
terminal tarsal segments darkened. Wings (Plate 1, fig. 23)
deep saturated brownish yellow, veins pale yellow, very difficult
to see against the ground. Venation: Vein M3 at apex deflected
strongly cephalad; vein 2d A strongly sinuous.
Abdomen brownish yellow; hypopygium yellow. Male hypopygium (Plate 3, fig. 42) with basistyles, b, slender. Both
dististyles slender, simple, of approximately similar outline, narrowed gradually to acute blackened tips; outer style, od, glabrous; inner style with a few microscopic setule before tips.
Gonapophyses, g, appearing as flattened plates, each bispinous,
inner spine nearly straight, the shorter outer spine strongly
curved.
Habitat.-Northern Korea.
Holotype, male, Chonsani, Paiktusan, altitude 4,200 feet, July
16, 1937 (Yankovsky).
Erioptera (Erioptera) pallidivena is quite distinct from the
other regional members of the subgenus, differing especially in
the body coloration, the pale wing veins, and the structure of
the male hypopygium. The only other generally similar species
in eastern Asia is E. (E.) xanthoptera Alexander, of Saghalien,
which differs in the details of body coloration and in the color
and venation of the wings. The male of the latter species is
still unknown. Among the European species the fly is closest
to E. (E.) squalida Loew, yet is amply distinct.
ORMOSIA (ORMOSIA) DUCALIS sp. nov. Plate 1, fig. 24; Plate 3. fig. 43.
Large (wing, male, over 7 millimeters); general coloration
black, including antennae and legs; halteres with conspicuous
light yellow knobs; wings strongly tinged with blackish; cell
M2 open by atrophy of m; vein 2d A nearly straight; male hypopygium with caudal border of tergite moderately produced;
three dististyles, outer clavate; gonapophyses appearing as slender, straight rods, tips acute.
Male.-Length, about 6.5 millimeters; wing, 7.2.
Rostrum and palpi black. Antenne black throughout, of moderate length, if bent backward extending about to wing root;
flagellar segments long-oval to elongate, especially the outer
ones; longest verticils unilaterally arranged, much exceeding
segments in length, especially the more basal ones. Head dull
black.