‘‘WHITE ANTS’’ AS PESTS IN THE UNITED STATES. 7 
Termites are able to extend their burrows throughout dry, hard 
wood and other dry substances far removed from the ground, and 
over impenetrable material, provided there is access to moisture 
Fig. 7.—Work of a western white ant, Calotermes sp., in Mexican walnut. Catalina Mountains, Ariz. 
( Original.) 
elsewhere, i. e., damp earth. They make use of a mixture of moist 
earth and finely digested, excreted wood in creating more favorable 
conditions of moisture and shelter while extending their galleries. 
White ants prefer to work in dark, warm, moist places. 
