132 LEPIDOPTERA INDICA. 



wing than to the apex of the cell ; upper discocellular nervule minute, outwardly 

 oblique ; middle and lower discocellulars upright, in one straight line, the middle 

 shorter than the lower ; second median nervule arising well before the lower end of the 

 cell ; first median arising rather less than twice as far from the second as the second does 

 from the third ; sub-median nervure slightly sinuous ; a large round patch of androconia 

 on the upperside of the wing occupying the outer end of the cell, anteriorly bounded 

 by the second sub-costal, posteriorly by the first median nervule. Jlindwing, with 

 costa greatly arched at the base, regularly arched to the apex ; apex well rounded ; 

 outer margin straight as far as the second median nervule when it is suddenly angled, 

 • from this tooth-like projection the outer margin is sinuated as far as the anal lobe ; 

 anterior to the anal lobe is an excavation ; abdominal margin convex ; tails two, of 

 nearly equal length, the inner rather the longer perhaps, arising from the terminations 

 of the sub-median nervure and first median nervule ; costal nervure much arched at 

 the base, regularly arched to the apex of the wing ; first sub-costal nervule also arched 

 at the base, arising well before the apex of the cell ; discocellular nervules straight, 

 strongly outwardly oblique, the upper a little sharper 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 ; sub-median and internal nervures 

 nearly straight. 



Female difiers from tlie male in both wings being broader, and in the absence of 

 the "male mark" in the forewing. 

 Type, Ojys ogi/r/es, 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 sub-median nervure and first median nervule, and three sub-costal nervules 

 to the forewing, in the secondarily sexual characters of the male. The genera Arrheno- 

 thrix, 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 its 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 

 difl:ers 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 ueuration and outline it agrees very closely with Tajuria, especially with Tajuria 

 jalindra, Horsfield, and its local races, T. indra, Moore, T. tarpina, Hewitson, but the 



