261, U. S. Dept. of Agriculture. 
Plate II 
-s 1 
V 
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\ 
a 
Parasites of the American Plum Borer. 
, Idecthis sp., a common parasite of the plum borer; upper figure, male; lower figure, female; 
considerably enlarged; b, hairworm reared from larva of the plum borer in 1912 at French 
Creek, W. Va., much enlarged; c, cocoon of the parasite Idecthis sp. within the cocoon of 
its host, much enlarged. (Original.) 
