INSECTS INFESTING THE PINE. 



CHAP. 



The Pine Weevil (Piagodes sti-obi) 159 



The Pales Weevil (HyloUux pales) 160 



The Norfolk Island Pine Scale (Uhleria 

 amucanre) IGl 



CHAPTER CLIX. 



The Pine Weevil. (Cal.) 



(Pissoiles strohi. — Peck.) 



Order, Coleoptera ; Family, CuRCULiONiDiE. 



[Living in the terminal shoots of pine trees ; a footless grub' 

 which is finally changed into a brownish beetle, marked with 

 two large whitish spots behind the middle of the wing-cases.] 



Fig. 233. 



Fig. 233.— Pine Weevil, en- 

 larged ; at the left, the weevil 

 — colors, brown and white ; 6, 

 the pupa, ventral view — color, 

 white ; a, the larva — color, 

 white, the head reddish. 



The larva3 (Fig. 233a) or 

 grubs of this weevil are some- 

 times very injurious to pine 

 trees, by destroying the terminal shoots ; as many as forty 

 have been found in one shoot, which the}^ had perforated in 

 various directions. They assume the pupa form (Fig. 2336) 

 within their burrows, first gnawing a passage to the outside 

 for the egress of the perfect beetles (Fig. 233, left). In the 

 vicinity of Sacramento these insects have peen found on pine 

 trees that had been planted for ornamental }»urposes. 

 Remedies. — Nos. 26 and 27. 



