Bulletin - United States National Museum

270 U.S. NATIONAL IVIUSEUM BULLETIN 25 7
lar small dots of
diverse size scattered along veins on posterior half
of wing and filling out apical area; parting vein and veins 5 and 6
narrowly dark piu'ple; upper and lower edges of ceU from beyond
base to about 2/3 of wing broadly suffused with light grey. Cilia
(imperfect) whitish mixed with purple.
Hindwing with veins 5 and 6 stalked, stalk rather short; hindwing
semipellucent; costa as far as vein 8 opaque and creamy, densely
scaled; apex and dorsiun with a suffused blackish band; all veins except
upper edge of cell thickly streaked with blackish, except parting vein
and veins 5+6 which are very narrowly blackish.
Male genitaUa: Uncus with slight excisions at bases. Gnathos
broad, about 2/3 length of tegumen + uncus, slightly constricted at
base, gradually narrowed beyond middle, top broad, truncate. Valva
curved, gently narrowed beyond base, top clavate.
Material examined : Mindanao, Zamboanga del Sur, 1 1 km NW of
Milbuk, 390 m, 5.VIII.1958 (H.E. Milhron), 1 d^, holotype, genit.
sHde 5325 (BMH).
Very similar to G. captiosella, but with distinct costal stigmata
before 2/3 of wing, and with dark-veined hindwing.
Gerontha diascopa, new species
Figures 421-422, 767
Female, 29 mm. Head creamy, on vertex suffused with grey
lateral tufts on vertex rising and hornlike, with dark fuscous suffused
apical spots, face with white lateral spots below. Labial palpus with
basal and median segments brushy, apical segment slender, compressed
frontocaudally; basal and median segments black, a white
spot at apex of median, terminal segment whitish, with a basal, a
median, and subapical somewhat suffused blackish band. Thorax
whitish, finely irrorated with light brown. Abdomen dark bronze
fuscous, becoming darker posteriorly, anal tuft pale ochreous, apical
segments with thin lateral fins of scales, gradually becoming two
slender dorsal crests on top of apical tuft, venter light greyish ochreous.
Posterior tibia dark fuscous, apex pale ochreous, tarsus pale ochreous,
dark ringed.
Forewing narrow, elongate-oval, costa gently concave anteriorly,
almost straight, rounded-prominent beyond 3/4, apex rounded, termen
rounded and oblique; with large tufts of raised scales; vein 2 from
well before angle, 3 and 4 stalked from angle, 7 to apex, 9 connate
with stalk of 7 + 8, 11 from 1/3. Creamy, irrorated with dark
brown, this color forming dense streaks or series of rounded spots along
veins, tending to form transverse strigulation. Costa suffused along
basal 3/4 with pale grey and marked with numerous dark brown
suffused transverse blotches; posterior fourth of costa creamy with