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, com- 

 pressed 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 



