TABLE 1.—­Analyses of plants stored by Dipodomys spectabilis spectabilis_ Merriam, obtained from examination of representative dens (all except Den 24 from U. S. Range Reserve, near the Santa Rita 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
Bouteloua rothrockii (mixed with Aristida spp.) 945
Boerhaavia wrightii 660
Bouteloua rothrockii }
Bouteloua aristidoides } 525
Aristida divaricata }
Aristida bromoides }
Kallstroemia laetevirens Tr. 
Heterotheca subaxillaris Tr. 
Plantago ignota 15
Fleshy fungi 10
          
                                                     -----
      Total 3,615

Eight species of plants represented by seeds.  One species of fleshy fungus in addition.

DEN 4.

September 20, 1918.  In Calliandra type.  Stony or gravelly soil, red, nearly denuded of grass.

        Species stored.  Grams.