( 392 ) 



Osteosema gen. nov. 



Forewings broad, triangulai- ; costa faintly cui-ved throughout ; more comex 

 before apex, which is blunt ; hindmargin not oblique, slightly bowed ; anal angle 

 well marked. Hindwings broad, with hindmargin rounded, and a slight angulation 

 in the middle at the end of third median nervule; anal angle widened and 

 produced ; antennae of S short, with regular short curved ciliations, which decrease 

 gradually towards the apex ; palpi short, feeble, not reaching beyond face (in S) ; 

 terminal joint short, drooi)ing. Underside of abdomen furry ; hind tibiae with two 

 pairs of spurs. 



Tyjje : 0. sanguilhieata !Moore (Comibaena). 



Thalerura marginata sp. nov. 



Of the same size, and shape, and colour as T. cunUissima Wlk., but the fringe, 

 instead of being yellow, is iron grey, without a dark basal line, and with white 

 dots at the ends of the veins; the exterior line is distinct, and denticulate, not 

 broken up into spots ; the yellow costa is only spotted with darker just before 

 the apex. Underside pale bluish wliite, witli no trace of cinereous suffusion on 

 either wing. 



One c? from Bhutan. 



Thalerura prasina sp. nov. 



Wings deep grass green ; costa of forewing ochreous, dusted with dark atoms • 

 fringe yellow with a dark purjjle basal line, interrupted by yellow dots at the 

 end of the veins, and with dark marks opposite these dots ; no di.stinct transverse 

 lines, but traces of whitish spots on the veins ; hindwings the same. Thorax 

 gi-een ; abdomen cinereous reddish ; face reddish with the lower part white ; vertex 

 and shaft of antennae white. Underside pale bluish white, with the fringe and 

 marginal line as above. 



Expanse of wings : 40 mm. 



One 6 from Bhutan. Distinguished by the bright green ground colour and 

 absence of markings. 



Gelasma irregTilaris sp. nov. 



Wings dull greyish greeu, covered with a multitude of small white sinuous 

 strigae ; first line vertical, sinuous ; second line oblique, denticulate and sinuous ; 

 the intervening .space darker green, still darker close to each line; the first line 

 edged internally, the second externally with whitish; a pale green discal ocellus 

 edged with darker ; hindwings the same ; fringes concolorous. Thorax and abdomen 

 cinereous green; vertex whitish. Underside dull greeni.sh white. 



Expanse of wings : 38 mm. 



One tJ from Bhutan. 



Akin to glaiLcaria Wlk., but the exterior line much more irregular, and 

 nearer the hindmargin. 



