PEEIDEA. — HYBOMA. 
45 
PERIDEA, Stejih. 
Peridea basistriga. (Plate CXXV. figs. 5, 6.) 
Heterocampa basistriga, Moore, Proc. Zool. Soc. 1888, p. 40t». 
$ . Closely allied to P. sikkima : 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 56 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.ffiNA, Hubn. 
Trisena denticulata. (Plate CXXV. fig. 8.) 
Trisena denticulata, Moore, Proc. Zool. Soc. 1888, p. 408. 
Neai'cst to T. furcifera from Florida, but the narrow 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 bi'own 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 iiisigiiis 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 fringe 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 40 
millim. 
Dharmsala ; at sugar. Eare. 
HYBOMA, Hiihi. 
Hyboma divisa. (Plate CXXV. fig. 7.) 
Ilyboma divisa, Moore, Proc. Zool. Soc. 1888, p. 409. 
Basal half and outer border of primaries whitish, clouded with smoky greyish brown; a 
