PL. XCVIi 



f 



recent years introduced 

 from Europe. It first ap- 

 peared about Quebec in 

 1860; since then it has 

 come to occupy the conti- 

 nent, and wherever cab- 

 bages are grown hundreds 

 of these butterflies may be 

 seen. The loss to garden- 

 ers which it causes is 

 estimated to run into mil- 

 lions of dollars annually. 

 It feeds on all the Cruci- 

 ferce. The multiplication 

 of P. rapce has been fol- 

 lowed by the partial ex- 

 tinction of our native Pie- 

 rids just as our birds have 

 disappeared before the 

 English Sparrow. Expanse 

 2.00 inches. 



PL. XCIX 





174 



