378 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. IX. 



and turned under and forwards. Hindwing, elongated, much longer 

 than broad ; costa greatly arched at the base, convex to the apex ; 

 apex much rounded ; outer margin regularly rounded to the anal angle ; 

 anal angle somewhat acute ; abdominal margin straight ; costal 

 nervure well arched, terminating at the apex of the wing ; first 

 subcostal nervule arising long before the apex of the cell ; disco- 

 cellular nervules almost erect, slightly only outwardly oblique, 

 strongly concave ; discoidal nervule obsolete ; second median nervule 

 arising a little before the lower end of the cell ; first median arising 

 about twice as far from the second as the second does from the 

 first ; sabmedian and internal nervures straight. Antennae long, 

 more than half the length of the costa of the forewing, with an 

 elongated slender club, the terminal crook short. Palpi porrect, 

 densely hairy, third joint almost invisible, hidden amongst the hairs of 

 the second joint. Thorax rather stout. Abdomen slender, reaching 

 just to the anal angle of the hindwing. Legs, foreleg with an 

 epiphysis ; hindleg, femur fringed throughout its length, not tufted ; 

 tibia with a single pair of long spines at its distal end. Type, 

 Itys iaderaj de Niceville. 



This genus may be nearest to Isma, Distant*, of which 7". cbscura. 

 Distant, is the type, a species I have not seen, and which appears to be 

 very badly figured (Rliop. Malay., p. 386, n. 1, pi. xxxv, fig. 19 (1886), 

 nor is the sex stated of the specimen described. Captain Watson's 

 diagnosis of the genus Isma was drawn up from " Hesperia " cephala, 

 Hewitson, which may or may not be congeric with Isma obscura. Itys 

 is certainly very near to the genus Arnetta^ Watson, Proc. Zool. Soc. 

 Lond., 1893, p. 81, of which " Isoteinon" atkinsoni, Moore, is the type. 

 It differs from the male of that species in the forewing being more 

 elongated, the inner margin being longer than (instead of the same 

 length as) the outer margin ; the discoidal cell is longer and narrower, 

 the second median nervule arises nearer the lower end of the cell, 

 there is also a greater space between the origins of the first and 

 second median nervules, the submedian nervure is straight instead of 

 being greatly distorted in the middle ; the inner margin is straight, 

 in I. atkinsoni it is lobed towards the base, the lobed portion being- 

 turned under ; the hindwing is more elongated, the disco-cellular 



* Ehop. Malay., p. 386 (1886). 



