Bui. 48. Div. of Entomology, U. S. Dept. of Affiiculture. 



Plate XVII 



Work of Timber and Bark-beetles in Spruce. 



a \y..rk of the syuu-x- lin.l..T-lH-.llr in the >,iuw>«»\ ..f s,.ni,o. ti.itun.I si/r; /,. Uiukus , /v,/,,,,,,,- 

 •.,/,, ,r„.v,Kr"winK ir.Mi. min..s .,i >,,ni.r tiinh.r (..-.■tie "n tlu' >urfarv .f theTv.KHl HnvMl 

 mrk h.1.1 1m...„ r,.,n..v,.,|, „„i..rnl M/.r: ,•, w..rk ..f ni..nl,,h„s ,wVm, Mm k M< ii .M.nK 

 (trom Kill, -s, n. s., |.,v. ..i Knt..ni..h,Ky. C S. |..-|.t. of AKhriilturo i ' ' ' 



