The Philippine journal of science. [Vol. 57, no. 1]

138

The Philippine Journal of Science

1935

(Plate 1, fig. 19) whitish subhyaline; cell Sc uniformly darkened; stigma brown, moderately conspicuous; veins brownish
black. Venation: Sc present as a spur; Rs pale, subequal to
basal section of R4+5; cell M1 petiolate; M4 departing at fork
of M, with m-cu at this same point, and so close to base of
cell 1st M2, in cases a little beyond the base, as in distans.
Abdominal tergites yellow, with a median brownish black
stripe, narrowly interrupted at the posterior borders of the segments; lateral stripes quite lacking; on sixth and seventh segments the black color more extensive; sternites uniformly pale,
the seventh and eighth more or less blackened; hypopygium pale.
Male hypopygium with the ninth tergite (Plate 4, fig. 45, 9t)
on either side projected into slender, straight, spikelike horns,
each with a series of six or seven blackened points along their
mesal edge; more mesally, the caudal margin of tergite is densely
set with blackened points that are directed away from the
median line. Dististyles, od, id, as figured. Eighth sternite
with caudal border transverse, unarmed, the median region at
and back from the margin with long abundant yellow setae.
Habitat.-China (Szechwan).
Holotype, male, Mount Omei, altitude 4,500 feet, August 10,
1929 (Franck). Allotopotype, female, pinned with type. Paratopotypes, 8 males and females, August 10 to 15, 1929 (Franck).
Paratype, 1 male, Beh-Luh-Din, altitude 6,000 feet, August 23
to 24, 1933 (Graham).
The nearest ally is the species next described as Nepthrotoma
pilata sp. nov., which differs especially in the details of coloration and structure of the male hypopygium.
NEPHROTOMA PILATA sp. nov. Plate 1, fig. 20; Plate 4, fig. 46.
Male.-Length, about 10 millimeters; wing, 10.5.
Generally similar and closely allied to N. impigra sp. nov.,
differing as follows:
Frontal prolongation of head entirely pale yellow, including
the nasus, the vestiture light golden yellow. Occipital brand
greatly reduced and poorly delimited, appearing only as an
irregular brown suffusion; orbital darkenings small but evident.
Praescutal stripes highly polished, very narrowly margined by
velvety black; lateral stripes straight; central darkening of
mediotergite extensive. Wings (Plate 1, fig. 20) a trifle more
suffused with dusky. Venation: Cell M1 very short-petiolate to
nearly sessile. Darkenings on abdominal tergites more exten