ON NEW AND LITTLE-KNOWN BUTTERFLIES. 397 



Habitat : Sumatra (Ilewitson and colls. Martin and de Niceville) ; 

 Borneo (jDruce) ; Malacca (Butler and Plots) ; Province Wellesley and 

 Singapore {Distant) ; Perak (coll. de Niceville). 



Genus GEHENNA, Watson. 



Gehenna, Watson, Proc. Zool. Soc. Lond., 1893, p. 108, n. 27. 



Male, Forewing, costa nearly straight ; apex acute ; outer margin 

 nearly straight, slightly convex only ; inner angle acute ; inner margin 

 straight, about the same length as the outer margin ; costal nervure 

 ending on the costa before the apex of the discoidal cell ; subcostal 

 nervules arising from the subcostal nervure at decreasing distances 

 apart from the base of the wing ; discoidal cell more than half 

 but less than two-thirds as long as the wing ; upper disco-cellular 

 nervule short, straight, strongly outwardly oblique; middle disco- 

 eellular very long, upright, straight ; loiver disco-cellular short, about 

 the same length as the upper disco-cellular, straight, inwardly oblique ; 

 lower discoidal nervule arises therefore much nearer to the third median 

 than to the upper discoidal nervule ; second median nervule arises 

 well before the lower end of the cell ; first median arises close to the 

 base of the wing ; submedian nervure straight. Hind wing, elongated 

 much longer than broad ; costa much arched at the base, then nearly 

 straight to the apex ; outer margin curved regularly and evenly to the 

 anal angle, not at all emarginate ; anal angle rounded ; abdominal 

 margin straight ; costal nervure ending at the apex of the wing ; costal 

 and subcostal nervures with an apparently common origin, but soon 

 separating, at the point of separation the two veins assume the form of 

 a "tuning-fork ;" first subcostal nervule arising long before the apex 

 of the cell ; discoidal cell rather long, reaching to the middle of 

 the wing ; disco-cellular nervules sinuous, the general direction 

 being slightly outwardly oblique ; discoidal nervule obsolete ; second 

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

 median arising also close to the end of the cell, not quite twice as far 

 from the second as the second arises from the third ; submedian and 

 internal nervures straight. Antennas long, more than half (nearly 

 two-thirds) as long as the costa of the forewing ; club moderately 

 large, elongated, with a rather long and fine apex or point. Palpi 

 very broad, densely hairy, porrect. the third joint very small. Head 



