LIFE HISTORY OF CARPENTER ANT. 



205 



that the carpenter ants are guiltless of much that they are 

 charged with and also that they may scarcely be credited with 

 having a distinctive architecture of their own. In solid wood 

 they follow the burrows of wood-boring larvae almost exclusively 

 making very slight changes as long as the wood is solid. In 

 Fig. 4 is shown a piece of wood taken from a large ash tree 

 which was hollow for a few feet at the base, and which was in- 

 habited by a large colony of C. ferrugineus and numerous wood- 



FlG. 5. View of a gallery of C. ferrugineus as seen in a radial section of decayed 

 oak. 



Fig. 6. Same as Fig. 1, as seen in tangential section. 



boring larvae. Both the ants and the wood-bores had entered 

 from the inside and were working outward toward the living 

 parts of the trunk. The ants were living entirely in the unaltered 

 galleries of the larvae. All that they had done was to clean out 



