Bulletin - United States National Museum

MICROLEPIDOPTERA OF PHILIPPINE ISLANDS 269
5 and 6 may be remote, connate or stalked. The distribution does
not seem to be entirely certain, since G. captiosella may prove to be a
complex of several similar species.
Male genitalia: Tegmnen moderate, bases going down far ventrad.
Uncus distinct, bilobed, each lobe with a small crochet, bristly.
Gnathos with arms moderate, angulate hook forming a moderate
rising triangular plate with a produced aciculose point. Vinculum
bandhke, moderately dilated in middle. Saccus long and very
slender, with a moderately dilated top. Valva rather narrow, excurved,
cucullus rounded, sacculus absent. Aedeagus long, slender,
tubular.
Female genitaha: Seventh segment elongate, caudal edge of ven trite
rounded-prominent. Intersegmental membrane between 7 and 8 long.
Eighth segment moderately sclerotized. Sterigma, a cardiform weak
plate, partially covered by two large semioval lateral folds.
Gerontha captiosella Walker forma 9
Female, 28-38 mm.
Figure 765
capna, new form
Similar to the typical form but with hindwing
opaque, greyish bronze, with darker veins. Hairs on posterior tibia
often grey.
The female genitaha show no tangible differences from those of the
typical form.
Material examined: Luzon, Mt. MakiHng (Baker), 1 9, holotype,
genit. sUde 5271; 5 9, paratypes. 6 9 (USNM).
Male, 26 mm.
Gerontha monostigtna, new species
Figures 433, 766
Head and thorax whitish, mixed and suffused with
grey. Palpus with basal segment brushy with scales, median segment
slender at base, abruptly expanded and brushy towards top;
purple black, top of median segment white, terminal segment, base,
middle, and tip mixed with pm-ple. Antenna fuscous. Abdomen
blackish purple. Legs, anterior and median black, tarsi white below
posterior grey mixed with purple,
tibia whitish, grey towards apex,
long hairs above grey, posterior tarsus white, each segment with a
blackish-purple wreath of short spines at the top.
Forewing narrow, sublanceolate, pointed, dorsum sinuate. Vein
2 connate with the stalk of 3+4, 7 and 8 long-stalked, 9 out of stalk
close to base. Creamy white, glossy, markings dark pm'ple. A
marginal row of small dots around the wing; a larger, rather conspicuous
quadrate-trapezoidal spot on costa beyond 2/3 (opposite
closing vein), limited below by upper edge of cell, foUowed by two
elongate marks posteriorly, ultimate mark smaller, subapical; irregu-