Snh-Family Pierince. 41 



costal iiervure emitted some distance before end of cell, 

 second a little beyond, third and fourth * forming a fork a 

 short distance beyond third ; discoidal nervure emitted 

 close to subcostal reducing upper disco-cellular to a mere 

 point ; lower disco- cellular strongly arched ; third median 

 branch emitted near to second. 



Hindwings pyriform ; costal nervure terminating before 

 apex ; first subcostal branch arched, emitted close to second 

 or upon a footstalk with it {U. Signata) ; upper disco- 

 cellular half the lengtli of lower and oblique ; lower disco- 

 cellular sub-angulate, waved, oblique ; third median branch 

 emitted near to second. 



Body slender, slightly hairy ; palpi and antennte short, 

 the latter with flattened club. 



GENUS 6. NYCHITONA. Bidlcr. 



Type N. Dorothea. Fabricius. 



Pontia, Boisd. nee Fabr. vel Hlibn. 



Frontwings subpyriform, the apex rounded, first and 

 second subcostal branches emitted far apart and generally 

 some distance before end of cell, the second sometimes at 

 end of cell {N. Niobe, 'Wallace), the third and fourth as in 

 UlocUna ; third median branch lialf as near again to second 

 as second to first. 



Hindwings subtriangular ; first sul:)costal l)ranch arched ; 

 second some distance beyond, emitted close to discoidal 

 nervure, reducing upper disco-cellular to a point ; lower 

 disco-cellular ol)lique, angulated ; tliird median branch not 

 far from second. 



Body very slender, slightly liristly; palpi very short ; an- 

 tennae long, ending in a long somewhat compressed club. 



GENUS 7. NATHALIS. Boisducal. 



Type N. Pole. Boisduval. 



Frontwings somewhat pointed, second subcostal emitted 

 at or beyond end of cell; third and fourth branches form- 

 ing a long fork to apex : disco-cellulars nearly perpendi- 

 cular, arched, lower twice as long as upper; median 

 branches near together towards end of cell. 



Hindwings subpyriform ; first subcostal arched, second 

 just beyond first and near discoidal nervure ; upper disco- 

 cellular short oblique ; lower long, oblique, subangulated. 



* This fourth subcostal may here represent the ui>per discoiilal of the 

 preceding division, 



B 3 



