TERMITE STRUCTURES 481 



through the bodies of the insects. The structure of some of the nest 

 walls suggests that these walls are constructed partly of earth and rock 

 fragments brought up from beneath the ground and built into the nests 



Figure 6. — Mound of Termites or White Ants, State of Minas Geraes, Brazil 

 From a photograph by R. Crandall, July, 1909 



by cementing them together with excrement or some other adhesive 

 substance. 



XXXIV— Bull, Geol. Soc. Am., Vol. 21, 1909 



