PIERIS. 



GENERIC CHARACTER. 



Feet nearly equal ; nails of the tarsi very appa- 

 rent, bifid or unidentate ; inferior wings dilated 

 beneath the abdomen, so as to form a groove. 



OBSERVATIONS. 



This is one of the many genera into which 

 the vast and sumptuous genus Papilio, of Linne, 

 has been separated. We are indebted for it to 

 Schrank. It nearly corresponds to the group of 

 Danai candidi, and includes the genera Colias 

 and PoNTiA of Fabricius, and Gonepteryx of 

 Leach. 



These butterflies are natives of various regions 

 of the globe ; some of them are very frequent in 

 almost every field, and must have been noticed 

 by the most casual observer, flitting with a devi- 

 ous direction over the herbage, and on meeting 

 with a companion, mounting aloft in the air, with 

 a hurried and irregular movement. Some species 



PLATE XXX. O 



