ON NEW AND LITTLE-KNOWN BUTTERFLIES. 297 



disco-cellular nervules straight, strongly outwardly oblique, the 

 upper a little shorter than the lower ; second median nervule arising 

 close to the lower end of the cell ; first median arising much 

 nearer the end of the cell than the base of the wing ; submedian 

 and internal nervures nearly straight. Palpi, long, naked, porrect, in 

 the same straight line as the axis of the body. Eyes naked. Antennae 

 short, about half as long, or a little less, than the costa of the 

 forewing ; with a long very slightly swollen club. Female, differs 

 from the male in both wings being broader, and in the absence 

 of the u male-mark " in the forewing. Type, Ops ogyges, de 

 Niceville. 



This genus is certainly allied to those which are clustered around 

 Camena, Hewitson, and Tajuria, Moore. It is, however, unique as far 

 as Indian genera go — at any rate in the group which has two short 

 tails to the hindwing in both sexes arising from the submedian 

 nervure and first median nervule, and three subcostal nervules to the 

 forewing — in the secondary sexual characters of the male. The 

 genera Arrlxenotlirix, de Niceville, and Camena have tufts of hair on 

 the inner margin of the forewing towards the base of the wing turned 

 under and forwards, which is entirely wanting in the genus Ops ; 

 nor does it possess the glandular patch of scales on the hindwing 

 towards the base of the costa found in those two genera and also 

 in Maneca, de Niceville ; but instead, it possesses a large round 

 patch of androconia on the upperside of the forewing near the 

 middle. As regards " male-marks" it is nearest to Maneca, but 

 that genus has it on the hindwing instead of on the forewing. From 

 Maneca it differs considerably in the outline of the wings, the 

 forewing has the costa much more convex, in Maneca it is nearly 

 straight, and the hindwing is produced outwardly tooth-like at the 

 termination of the second median nervule, which is not the case in 

 Maneca. In neuration and outline it agrees very closely with 

 Tajuria, especially with Tajuria jalindra, Horsfield, and its local 

 races, T. indra, Moore, T. tarpina, Hewitson, and T. burbona, Heivitson 

 (=" Charana " datoe, Martin, MS.) ; but the presence of the " male- 

 mark " separates the species of Ops from all those of Tajuria. 



