PLATE XV. 
hp 
fie. 1. Galleries of the Blue pine Tomicus, Tomicus sp., in Blue 
pine bark; » pairing chamber; e. egg-gallery; 
1, larval gallery. 
» 2. Galleries of Polygraphus minor, MS., on inner surface of 
Blue pine bark ; /. pairing chamber ; e, egg-gallery; 
1, larval galleries. 
» 3. Galleries of Tomicus sp. and Polygraphus minor in Blue 
pine bark; , pairing chamber; e. egg-gallery ; 
1, larval;gallery. 
» 4 Galleries of Tomicus sp. and Polygraphus minor in Blue 
pine bark showing how they at times run into one 
another so as to be indecipherable, 
