INSECTS INJURIOUS TO CABBAGE, ETC. 



321 



The Imported Cabbage Worm * 



Probably the worst pest of the cabbage and one of the best- 

 known garden insects is the common cabbage worm, whose parent 



FIG. 270. The cabbage butterfly (Pontia rapce Linn.): a, larva; 6, chrysalis; 

 c, male butterfly; d, female butterfly. (After C. M. Weed.) 



is the common white butterfly. It is an old European pest and 

 was imported near Quebec, Canada, about 1860, whence it spread 



* Pontia rapce Linn. Family Pieridce. See F. H. Chittenden, Bulletin 766 , 

 U. S. Dept. Agr. 



