NOTES OX ( 'L11<10CAM;'A DltSTRIA. 'i" 



its existence. Very few of the caterpillars were found, nearly 

 all having gone into the cocoon stage, of which there were thous- 

 ands. \Mien opened it was found that an enemy had already 

 appeared in the form of an ichneumon, which I unfortunately 

 failed to identify, the cocoons gathered for this purpose being 

 accidentally destroyed on my way home. The percentage of 

 these examined shov/ed one in ten infected with the ichneumon. 

 Pickard gives its food plant as the a})ple and oak; Harris, the 

 oak and walnut; while Treat gives api)l*^, oak and hickory, show- 

 ing it to i)e [K-ac:ically a cosmopolitan feeder, as we will no doubt 

 see as it increases in numbers in this section, feeding on many 

 other kinds of food plants. 80 far its ravages were confined en- 

 tirely to the [) )[»lar in the above district, but I found in August, 

 large numbers of the moths on elms around the electric light in 

 Elm-Linden Park in Chatham. To the ordinary observer the 

 A[)i)le Tree Tent Cater[)illar and the Forest Tent Caterpillar are 

 identical, and at first sight this appears to be the case, but 

 closer examination will show the latter to have a row of sjiots 

 alone: tlie l,)ack instead of a line as is the case in the former. 



