52 PIERID/E. 



Genus VI. ZEGRIS Rambur. 

 Rambur, Ann. Soc. Ent. de France, v. 581. (1836). 



Piebis God'., Menetries. 

 Pontia Eversman. 



Head broad, clothed with long hairs. 



Eyes round, not very prominent. 



Labial Palpi densely hairy ; the first and second joints about equal, rather slender, subcylindric ; 

 third joint about one third the length of the second. 



Antenna; short ; terminated by an abrupt, oval, compressed club. 

 Thorax very stout, densely clothed with fine long hairs. 



Anterior Wings triangular ; the costa slightly sinuate. Costal nervure stout. Subcostal nervule five- 

 branched : its first nervule thrown off at about three fourths the length of the cell ; the second at 

 the end of the cell ; the third and fourth near the apex, the latter about equidistant from the 

 third and the apex. First discoidal nervule united for a considerable distance to the subcostal. 

 Lower disco-cellular long, curved. 



Posterior Wings subquadrate, rounded. Abdominal margin scarcely forming a channel of the 

 abdomen. Precostal nervure simple. Discoidal nervure appearing to be a third subcostal 

 nervule. 



Legs rather short. Tarsi with the second, third, and fourth joints nearly equal. Claws long, very 

 deeply bifid, the inner tooth much shorter than the outer. Paronychia not so long as the claws, 

 reaching nearly to the end of their inner tooth, lancet-shaped, slender. Pulvillus very short, not 

 one fourth the length of the claws. 

 Abdomen short, rather stout, hairy. 



Larva stout, hairy, nearly cylindrical. 



Pupa short, gibbous, not tuberculate ; head pointed, blunt ; abdomen arched, pointed, the 



segments immovable. Enclosed in a delicate, silken, net-like web, and sustained by a 



transverse thread. 



This remarkable genus differs from Anthocharis in having the antennas shorter and stouter ; the thorax much more 

 robust and hairy ; the legs stouter, with the claws longer, and the pulvillus very short. The tarsi, though still 

 retaining the general characters of the group, have the second, third, and fourth joints more nearly equal than usual. 



In the habits of the larva, and in the form of the pupa, it presents a marked distinction from any known genus of 

 the Pieridre, and approaches more nearly to Parnassius, to which genus its short antenna? and robust thorax give it a 

 great resemblance. 



