Mountains, Ariz.)._


DEN 1.

February 7, 1918. Burrow typical, located on bank of wash in partially
denuded grass-land, _Bouteloua rothrockii_ and weed type; soil sandy;
burrow photographed in section (Pl. VII, Fig. 1).

Species stored. Grams.

Bouteloua rothrockii 2,205
Bouteloua aristidoides (B. eriopoda and B. rothrockii, Tr.) 1,445
Plantago ignota 442
Eriogonum polycladon 35
-----
Total 4,127

Four species of plants represented in burrow contents (Pl. VII, Fig. 2).
Maximum quantity for single burrow in series of 22 from Range Reserve.


DEN 2.

March 9, 1918. Surroundings overgrazed and partially restored by
complete protection. Red soil, with much coarse rough gravel and stone.

Species stored. Grams.

Bouteloua rothrockii (nearly pure) 1,460