1893.] ME. E. Y. WATSON ON THE HESPERIID.l. 83 



of cell and base of wing, slightly uearer to base of wing. Hind wing : 

 outer margin even ; vein 7 shortly before end of cell ; vein 3 from 

 end of cell ; vein 2 more than twice as far from base of wing as from 

 end of cell. Hind tibise with two pairs of spurs. 



*ophiusa, Hew. 



The above diagnosis is taken from ophiusa, Hew., which Mabille 

 includes in his genus Hypoleucis. 

 Confined to Africa. 



21. Genus Isoteinon. 



Isotehion, Felder, Wien. ent. Monat. vi. p. 30 (1862). 



Type, lamprospilus, Felder. 



Antennae : club moderate, elongated, terminal crook short, tip 

 acuminate. Palpi ; second joint densely clothed with short scales ; third 

 joint erect, reaching well above the vertex of the head, slender, 

 obtusely conical. Fore wing : inner margin considerably longer than 

 outer margin; cell less than two-thirds the length of costa ; disco- 

 cellulars erect ; vein 5 slightly nearer to 4 than to 6 ; vein 3 close to 

 end of cell ; vein 2 about equidistant from end of cell and base of wing 

 in the male, considerably nearer to base of wing in the female. Hind 

 wing narrow ; vein 7 shortly before end of cell ; discocellulars and 

 vein .5 faint, but distinctly traceable ; vein 3 immediately before end 

 of cell. Hind tibise sparsely clothed with hairs and with two pairs 

 of spurs. No secondary sexual characters on the wings. 



\ vitrea, Murray, 



Many Indian species have been put into this genus ; none of those, 

 however, which I have been able to examine belong to it, the 

 direction of the third joint of the palpi alone readily distinguishing 

 them. This genus appears to be allied to Hi/arotis, Moore. 



Habitat. China and Japan. 



22. Genus Isma. 



Isma, Distant, Rhop. Malay, p. 38b (1886). 



Type, obscura, Dist. 



AntcnncB : club slender, elongate, with a short terminal crook, tip 

 acuminate. Palpi porrect ; third joint slender, almost concealed, 

 bluntly conical. Fore wing : inner margin longer than outer 

 margin ; cell less than two-thirds the length of costa ; vein 12 

 reaching costa well before the end of cell ; discocellulars suberect ; 

 vein 5 slightly nearer to 4 than to 6 ; vein 3 shortly before end of 

 cell ; vein 2 almost equidistant from vein .'5 and base of wing. 

 Hind wing : not at all elongated, outer margin even, inconspicuously 

 excised as vein 2 ; vein 7 immediately before end of cell, very re- 

 mote from base of wing ; discocellulars faint, strongly outwardly 

 oblique ; vein 5 not traceable ; vein 3 cloic to end of cell ; vein 2 

 more than twice as far from l)ase of wing as from end of cell ; lower 



6* 



