38 PIERID.E. 



Genus III. LEUCOPHASIA Stephens. 

 Stephens, III. Haust. i. 24. (1827). 



Leptosia Hiibn. 



Ganoris Dalman. 



Pontia Ochs. 



Pieris God 1 . 



Leptoria Westivood, in Humphreys's Brit. Butterflies, 31. (1840). 



Head rather large, very hairy. 



Byes large, round, prominent. 



Labial Palpi rather longer than the head, very hairy. Basal joints long, curved at the base, 

 carinate externally, obliquely truncate at the apex ; second joint rather more than one third the 

 length of the first, much more slender, ovate, truncate at the base ; third joint about one sixth 

 the length of the first, oval. 



Antennae short, terminating in an abrupt, short, compressed club. 

 Thorax rather slender. 



Anterior Wings elongate, rounded externally. The discoidal cell very small, barely one third the 

 length of the wing. Subcostal nervure five-branched ; the first nervule thrown off about the 

 middle of the wing ; second about equally distant from the first and third ; fourth rather nearer 

 to the third than that is to the second. Upper disco-cellular nervule very short, barely visible 

 above. Submedian nervure bent near the base. 



Posterior Wings obovate. The discoidal cell very small. Subcostal nervure branching beyond the 

 middle of the wing. Discoidal nervure thrown off from the subcostal about midway between the 

 bifurcation of the latter and the base of the wing, much bent at the end of the cell. Lower 

 disco-cellular nervule short. Submedian nervure bent near the base. Precostal nervure 

 branched ; the inner branch very short and obscure, the outer rather long. 



Legs slender. Paronychia as long as the claws, very slender. Pulvillus very minute, consisting 

 merely of a very small fringed cushion, placed between the claws, quite at the base, only visible 

 below. 

 Abdomen slender, elongate, extending slightly beyond the posterior wings. 



Larva slender, tapering towards each extremity, pubescent. 

 Pupa elongate, angular, not arched. 



Closely allied to Leptalis in many points of structure, this genus may be always known from it. by its palpi, which 

 in Leptalis are more minute than in any other genus of this family ; by its short abruptly clavatc antenna;, and its very 



