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



nervure ; anal angle rounded ; abdominal margin nearly straight ; 

 costal nervure long, gently curved throughout its length, ending at 

 the apex of the wing ; first subcostal nervule arising far before the 

 apex of the cell ; disco-cellular nervules upright, slightly concave, of 

 equal length ; discoidal nervule present, fine, the outer portion deflect- 

 ed downwards so that that portion lies nearer the third median . than 

 the upper discoidal nervule ; second median nervule arising close to the 

 lower end of the cell ; first median arising about twice as far from 

 the second as the second does from the third, arising much nearer the 

 lower end of the ceil than the base of the wing ; discoidal cell reach- 

 ing to about the middle of the wing ; submedian and internal nervures 

 straight. Antenna a little more than half the length of the costa of 

 the forewing, the club moderate, with a fine terminal crook about 

 twice as long as the greatest breadth of the club. Palpi broad, 

 densely hairy, third joint but very slightly projecting above the second. 

 Thorax slender, weak. Abdomen reaching just to the outer margin 

 of the hindwing. Legs, foreleg, tibia with an epiphysis ; hindleg, 

 tibia with two pairs of spurs. Female. Differs from the male only in 

 the absence of the patch of modified scales on the underside of the 

 forewing, and in having both wings somewhat broader. Type, 

 " Hesperia " anthea, Hewitson. 



Acerbas appears to me to be nearest allied to the genera Eetion, 

 de Niceville, and Zea, Distant, from the former the male may be 

 readily distinguished by the quite different character of the secondary 

 sexual characters, the lower disco-cellular nervule of the forewing is 

 much shorter, and the first median nervule of the forewing arises 

 nearer the base of the wing ; from the latter it differs in having the 

 middle disco-cellular nervule of the forewing upright instead of 

 strongly inwardly oblique. Zea also has no secondary sexual charac- 

 ters in the male whatever. 



(1) ACEBBAS ANTHEA, Hewitson. 



Hesperia anthea, Hewitson, Desc. Besp., p. 29, n. 17 (1868}; Plesioneura (?) anthea, 

 Distant, Rhop. Malay., p. 404, pi. xxxv, fig. 32, female (1886) ; Cobalus ciliatus, Butler, 

 Trans. Linn. Soc. Lond., Zoology, second series, vol. i, p. 554, n. 2 (1877). 



Habitat : Singapore (Hewitson) ; Malacca (Butler) ; Borneo 

 (Boherty, coll. Elwes) ; Daunat Range, Tenasserim, Burma ; Java 

 (coll. de Niceville) ; N.-E. Sumatra (coll. Martin). 



