PERIDEA. — HYBOMA. 45 



PERIDEA, Steph. 

 Peridea basistriga. (Plate CXXV. figs. 5, G.) 

 Heterocampa basistriga, ^oore, Froc. Zool. Soc. 1SS8, p. 400. 



$ . Closely allied to P. sikkbna : primaries a little wider, much blacker, and with all the 

 black markings more prominent ; the yellow scaling obsolete ; the central belt wider, so that 

 its outer edge approaches nearer to the outer margin : secondaries without the reddish tinge 

 of P. sikkima : thorax and abdomen corresponding in colouring with the primaries and 

 secondaries respectively. Under surface greyer, the yellowish tinge of P. sikkima being absent. 

 Expanse of wings 5G millim. 



Two very worn examples of the male have the white markings on the primaries more 

 pronounced than in the female, and the secondaries almost wholly pure white. Expanse of 

 wings 47-49 millim. 



Dharmsala ; at sugar. 



Said to be a rare species. 



The genus Peridea is quite distinct from Heterocampa in structure, and though there is 

 a general resemblance in pattern between the two genera, they are not even nearly allied. 



TRI.a;NA, Hiibn. 

 Triaena denticulata. (Plate CXXV. tig. 8.) 

 Trisena denticulata, JSIoore, Proc. Zool. Soc. 1888, p. 408. 



Nearest to T. ftircifera from Florida, but the nariow primaries suffused with brown, and 

 with a black basal streak in the female connected with the " dagger " streak by an intermediate 

 dark brown shade, a second more or less pronounced dark brown shade or streak on the 

 radial interspaces connecting the discal denticulated black line with the outer margin, thus 

 producing a fair copy of the primaries of Destolmia i/isignis of Japan : the secondaries, unlike 

 those of T.furcifera, are pearly white, the outer half of the veins, a few marginal lunules, and 

 a few small spots on the fi'ingc dark brown : body grey ; the thorax brownish in front. 

 Primaries below silvery whitish, tinted on the costal half with brown ; costal margin pure 

 white, crossed by a few brown dashes : secondaries almost as above. Expanse of wings 10 

 millim. 



Dharmsala; at sugar. Eai'c. 



HYBOMA, Hiibn. 

 Hyboma divisa. (Plate CXXV. fig. 7.) 

 Ilyboma divisa, Moore, Proc. Zool. Soc. 1 888, p. 400. 



Basal half and outer border of primaries whitish, clouded with smoky greyish brown; a 



