Bui. 41 , Div. of Entomology, U. S. Dept. of Agriculture. 



Plate X. 







''""-•.a ''>^ 



Fig. 1.— Band on which the Remains of 330 Cocoons were 

 Counted. 



Fig. 2.— Pupa in Cocoon on Underside 

 OF a Loose Piece of Bark. 



Fig. 3. — Larva and Pup/e in Cracks 

 IN Bark, from which Rough Bark 

 HAS BEEN Removed. 



