Bui. 43, Div. of Entomology, U. S. Dept. of Agiicultute. 



Plate XII 



Galleries and Mines of the Spruce-destroying Beetle. 



ShowiiiK iHirt.si.f si.\ j.rimary Kiillt'rii'.s. reclineil iil«)iH oiu-foiirth ( Kr.nii Hiil 

 ■2s. II. .^., iMv. of KllIoll|..l..^'y, r. s. iH'pt. of Avrriciilliin-.) 



