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

67, 2

Alexander: Tipulids from Eastern Asia, XL

143

subhyaline, tip broadly but inconspicuously darkened; prearcular
field and costal border very pale yellow; stigma oval, dark
brown; veins dark brown, paler in yellow areas. Venation:
Sci ending about opposite fork of Rs, Sc2 at its tip; cell 1st
M2 long, a little wider at basal end, subequal in length to vein
M4 beyond it; m-cu less than its own length beyond fork of M.
Abdomen dark brown, very sparsely gray pruinose; valves of
ovipositor elongate, horn-colored.
Habitat.-Northern Korea.
Holotype, female, Chonsani, Paiktusan, altitude 3,000 feet, July
18, 1937 (Yankovsky). Paratopotypes, 5 females, altitude 3,000
to 3,500 feet, July 18 to 20, 1937 (Yankovsky).
Helius (Helius) polionota is entirely distinct from the other
regional species of the genus, the gray coloration of the thorax,
the pale antennal flagellum and the distinctive pattern of the
legs and wings.
HELIUS (HELIUS) GRACILLIMUS sa. nov. Plate 1, fig. 10: Plate 2. fig. 32.
General coloration of mesonotum obscure yellow, praescutum
with faint indications of darker stripes; posterior sclerites of
notum darkened, pleura and pleurotergite yellow; rostrum dark,
a little longer than remainder of head; halteres yellow, knobs infuscated; legs obscure yellow, tips of femora and tibiae narrowly
dark brown; wings grayish subhyaline, prearcular and costal
portions a little more yellowish; a restricted brown pattern,
including seams at origin of Rs and along cord; m-cu shortly
beyond fork of M; abdominal tergites dark brown, lateral margi.ns yellow; basal sternites more uniformly yellow; male hypopygium with basistyles slender, on mesal face near base with a
stout setiferous lobe; outer dististyle an unusually slender blackened rod, apex simple and obtuse.
Male. —Length, including rostrum, about 7 millimeters; wing,
8; antennae, about 3.
Female.-length, including rostrum, about 9.5 to 11 millimeters; wing, 9 to 10.
Rostrum slightly longer than remainder of head, dark brownish gray; palpi black. Antennae black, pedicel a trifle brightened;
flagellum elongate, especially in male, as shown by measurements; flagellar segments long-cylindrical, with a dense erect
pale pubescence and scanty, slightly longer verticils; terminal
segment short, approximately one-third to one-fourth penultimate. Head dark gray; anterior vertex narrow.
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