I 'I, ATE LI. 



\ \a 



Ib 



Ir 



Polygraphus longifolia, Steb., in /'inns livigifolia, i, i</, larva and pupa ; if>, ir, male 

 and female beetles ; \d, entrance-holes of beetles in outer bark of the tree ; i/', pairing- 

 chamber (/> ', Kg galleries (g\ larval galleries (/ , and aeration holes (a) in the bast layer. 

 North-West Himalaya. 



