Plate LI. 



la 



l/> 



M 



5 ^^'N'^ 



Poly'i^raphiis loiigifolia, Steb.. in Piiius loiigifolia.—\, \a, larva and pupa : \l>. i(, male 

 and female beetles ;" i(^/, entrance-holes of beetles in outer bark of the tree; ic', pairing- 

 chamber \p), egg galleries [g), larval galleries (/ , and aeration holes {a) in the bast layer. 

 North-West Himalaya. 



