190 U.S. NATIONAL MUSEUM BULLETIN 25 7 



moderately pointed, laterally mth more pointed and longer processes. 

 Tuba analis long, slender, conical, and hairy. Gnathoslong, pending, 

 furcate, actually being a membranous band supported by two slender 

 lateral rods, parallel basally, diverging apically and ending in two 

 acute points. Saccus slender and rather short. Valva oblong-oval, 

 its base double, ventral edge extended; saccidus, indicated as a narrow 

 fold along basal third, this fold abruptly but moderately thickened 

 along median third. Cucullus simple. Aedeagus pistol-shaped, 

 barrel part long, straight, grip part slender, short. Coremata very 

 long inverted pencils, in finger-like impressions of the eighth inter- 

 segmental membrane. 



Material examined: Luzon, Los Banos, XI.1924 (S. Cendrana), 

 1 male, holotype, genit. slide 5398, "000015" (USNM). 



Imma Walker, 1858 



Key to the Philippine Species of Imma 



1. Fore wing with basal half bright yellow 2 



Forewing with basal half not yellow 3 



2. Forewing with outer half brown, edged black I. basiflava 



Forewing with outer half black I. aurantiaca 



3. Hindwing with a yellow base I. chrysocosma, new species 



Hindwing without yellow 4 



4. Forewing with a transverse fascia (sometimes very narrow) 5 



Forewing without a transverse fascia ' . 10 



5. Transverse fascia white or whitish 6 



Transverse fascia yellow 9 



6. Transverse fascia direct 7 



Transverse fascia distinctly oblique 8 



7. Transverse fascia from middle of costa to dorsum just beyond middle, 



moderate I. macrochorda, new species 



Transverse fascia from beyond middle of costa to 2/3 of dorsum. 



I. macrochorda regmophora, new subspecies 



8. Forewing with basal half lighter than outer half, a yellow mark on costa 



before apex I. albifasciella 



Forewuig entirely dark fuscous, no yellow costal marks . . I. albotaeniana 



9. Forewuig light fuscous olive I. poecilostoma, new species 



Forewing dark purplish fuscous I. pyragra, new species 



10. Larger species, 28-30 mm, a whitish irro ration or 2/3 of costa. 



I. tyrocnista 

 Smaller species, 18-23 mm, no whitish costal irro ration 11 



11. Hindwing fuscous grey I. nephodryas 



Hindwing dark purplish fuscous, with a paler discal spot. 



I. sarophora, new species 



Imma aurantiaca (Semper, 1899) 



Figures 289, 665 



Sidyma aurantiaca Semper, 1899, Schmetterlinge Philippinischeu luseln, vol. 2, 

 p. 501, pi. 59, fig. 9 (cf 9, East Mindanao). 



