22 BULLETIN 1091, U. S. DEPARTMENT OF AGEICULTURE. { Buul^Na^i, 



in this burrow contained a mass of fresli but finely comminuted green material, 

 probably poppy leaves, strongly colored with yellow from blossoms. No sum- 

 mer growth here in 1918. 



Species stored. Grams. 



Bouteloua rothrockii (crowns) (miscellaneous chaff, etc.) 107 



Eschscholtzia mexicana (buds and flowers) 



Anisolotus trispermus (leaves and pods) 



Gaertneria tenuifolia (leaves) 



Lupinus sparsiflorus (flowers) 



Solanum elaeagnifolium (2 fruits) Tr, 



10 



Total 117 



Six species represented, some only by leaves or flowers and not by seeds. 

 Such storage is never in large quantity. The fresh storage material was 

 weighed after becoming air dry. This illustrates a late spring condition, stor- 

 age running low. 



Den 14. 



August 8, 1919. Excellent summer growth all over range. This burrow in 

 mixed growth, grasses and weeds. 



Species stored. . Grams. 

 Miscellaneous portions of green plants of mixed species, no seeds 5 



Representing minimum for any one of the 22 burrows studied. Active storage 

 does not begin until September. 



Den 16. 



October 17, 1919. In good grass, but mound overrun by a large Apodauthcra 



vine. 



Species stored. Per cent. Grams. 



Aristida divaricata 90 to 95] 



Chamaecrista leptadenia 10 to 5 58 



Bouteloua rothrockii Tr.J 



Prosopis velutina 200 



Apodanthera undulata 55 



Total 313 



Five species represented. Two species, Apodanthera and Chamaecrista lepta- 

 denia. new to storage records. Several whole fruits of Apodanthera, about 2 

 inches in diameter, stoi-ed in addition to seeds alone ; seeds of this form not 

 previously noted in burrows, but very abundant in this one, indicating impor- 

 tance of the factor of accessibility in storage. 



Den 19. 



October 31, November 1, 1919. In good grass. Entire burrow system mapped 

 (Fig. 2, p. 29). 



Species stored. Per cent. Grams. 



Aristida spp. (probably mostly divaricata) 98 



Eriogonum sp Tr. 



Bouteloua rothrockii 1 1,813 



Bouteloua aristidoides '. 1 



Panicum sp Tr. 



Prosopis velutina 1, 213 



Total 3,026 



