ORDER COLEOPTERA 209 



about the time the beetles of the over-wintering generation 

 die, i.e., about the middle of May in southern Illinois. For 

 the ensuing four or six weeks the beetles of the new genera- 

 tion feed on the foliage of apple and other trees and fly from 

 tree to tree. Before midsummer they descend to the ground, 

 creep away into trash, grass or soil and there remain for the 

 remainder of the summer and following winter apparently 

 without food. 



Orchestes rufipes is known from Quebec and Newfoundland 

 to New York and west to California. It was found by H. H. 

 Knight mining the leaves of the shining willow, Salix lucida, 

 at Batavia, New York. The beetles were feeding on the 

 leaves for the first two weeks in July and the grubs were 

 found in the leaves during August and September. 



Of European species one is a miner in oaks, one in birch, 

 one or more in willows and poplars, and over 50 other 

 species probably many of them leaf miners. 



