National Geographic : 1940 Oct
0 On the Surface of the Desert Dipo's Home Show Only Lumps and Many Exits and Entrances Underground he digs a labyrinth of passages winding above and below each other to a depth of one to four feet. This subway network includes anumber of storerooms and the grass-lined nest. The author has never seen foxes and coyotes try to dig into these burrows; infact, foxes arenever seen inthedaytime, and coyotes but seldom (page 538). In the distance are the Bullion Mountains (see map supplement "Southwestern United States" intheNATIONAL GEOGRAPHIC MAGAZINE for June, 1940).