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



Plate XXII. 



Work of the Redwood Bark-beetle. 



fi. .Siirfacoof wfKxl KrrM.vi-d l.y priiimrv ualliTic- iiikI larviil 



■" nr<ni(jli imv ' 



L'pi. "I .\grieultiirc.) 



.siirfacoof wrKxl nrrNivi..! l,y primary ualluri.- an.l larval iniius; /,. l.ark with irall.-ri*"* and 



