Bui. 4a, Div. of Entomology, U. S. Di,'|jt. of Agngultur 



Plate III. 



Work of the Pine-destroying Beetle of the Black Hills. Primary Galleries 

 AND Larval Mines in Inner Surface of Living Bark. 



(I, Entrnnro umi lia.siil clmtnliiT: /«. vciitilalinjr Imlos in nnif of KuMerv: r, tfnniiiuti<in. 

 The liirvnl iiiiiu-s nulinU' from the priiiiurv Kiillcrics. .\lK)ut oiu-half iinliinil si/e. 

 (Author'.s ilhi.stnuittii, Bui. 3J. ii. s., Div. of Eiiloiuologv, U. .S. Dei>t. of AKriiiilturc.) 



