96 AECTIIDJE. 



Genus DIDUGA. 



Diduga, Moore, Lep. Ceyl iii, p. 535 (1887). 

 Androstigma, Hmpsn. Ill Het. ix, p. 82 (1893). 



Type, D. costata, Moore. 



Range. Nilgiris ; Ceylon. 



Palpi slender and obliquely porrect. Tibiae with the spurs long. 

 Fore wing with vein 3 from before angle of cell ; 4 and 5 from the 

 angle ; 6 from upper angle ; 7 and 8 stalked. Hind wing with 

 vein 4 from angle of cell ; 5 from above the angle ; 3 absent ; 

 6 and 7 stalked. Fore wing of male with a costal fold acting 

 as the retinaculum. 



SECT. I. (Diduga}. Antennae of male ciliated. Hind wing with 

 no patch of differently-formed scales near anal angle. 



1396. Diduga fuinipennis, Hmpsn. III. Het. viii, p. 52, pi. 140, fig. 7. 



(5 1 . Head and collar yellow ; thorax and fore wing smoky 

 brown ; the latter with the costa blackish and with a yellow spot at 

 centre ; cilia yellowish towards outer angle. Abdomen and hind 

 wing slightly paler. 



Hob. Nilgiri plateau. Exp. 19 millim. 



1397. Diduga COStata, Moore, Lep. Ceyl. iii, p. 535. 



Diduga fulvicosta, Hmpsn. III. Het. viii, p. 52, pi. 140, fig. 16. 



Head, collar, and tegulae bright yellow ; thorax and fore wing 

 dark leaden grey ; the latter with the costal area bright yellow 



irrorated with a few black scales 

 and with its lower edge waved ; 

 the costa black near base and with 

 ante- and postmedial black specks; 

 a marginal bright yellow band with 

 a pale waved inner edge ; cilia 

 orange-yellow. Abdomen and hind 

 Fig. 58. Diduga costata, $ . }. wing paler. 



The form fulvicosta from the 



Nilgiris has the marginal band of fore wing reduced to a spot 

 above outer angle. 



Hob. Mlgiri plateau ; Ceylon. Exp. 16-18 millim. 



SECT. II. (Androstrgma}. Male with the antennae bipectinated, 

 the branches short. Hind wing with a large patch of modified 

 scales near anal angle. 



1398. Diduga albicosta, Hmpsn. III. Het. viii, p. 53, pi. 140, fig. 17; 



III. Het. ix, p. 82, pi. 158, fig. 25. 



Head, collar, tegulae, and prothorax white; meso- and meta- 

 thorax dull leaden grey. Fore wing dark leaden grey ; a white 



