Evolution and Taxonomy 113 



radius) than do the L3'caenidse ; but the Pieridse do not 

 exhibit that specialization by reduction of the fore legs which 

 is characteristic of the lyj^caenidse and Nymphalidse. In the 

 Nymphalidse we find not merely the extreme of the reduction 

 of the fore legs, but an even greater specialization of the 

 wings than exists in the Pieridse. 



Ithaca, N. Y., 

 27 July 1893. 



