Den 6.
October 17, 1918. Mixed type, partially denuded, no growth from summer rains. Sandy soil.
| Species stored. | Grams. |
| Bouteloua rothrockii (crowns) (heads 1 to 2 per cent) | 1,435 |
| Bouteloua rothrockii (heads and crowns, about 50 per cent of each) | 325 |
| Bouteloua rothrockii (with small percentage of crowns) | 315 |
| Boerhaavia wrightii (with a few grass crowns) | 150 |
| Prosopis velutina | 90 |
| Solanum elaeagnifolium (3 fruits) | Tr. |
| Total | 2,315 |
Four species represented. Count of 100 grams of stored Bouteloua crowns gives 1,700, or 17 crowns per gram. At this rate there were at least 27,000 crowns stored in this burrow. If a density of 250 plants to the square yard be assumed (a high estimate) these crowns represent the total B. rothrockii on 104 square yards of range surface. Further examination of the vicinity of this den showed that the surrounding area was not completely cleared, but was devoid of B. rothrockii, while still having B. eriopoda with crowns undisturbed.
Den 11.
April 9, 1919. In partially denuded land where good spring growth of Eschscholtzia was in bloom at time of excavation. Stomach of spectabilis killed in this burrow contained a mass of fresh but finely comminuted green material, probably poppy leaves, strongly colored with yellow from blossoms. No summer growth here in 1918.
| Species stored. | Grams. | |
| Bouteloua rothrockii (crowns) (miscellaneous chaff, etc.) | 107 | |
| Eschscholtzia mexicana (buds and flowers) | } | 10 |
| Anisolotus trispermus (leaves and pods) | ||
| Gaertneria tenuifolia (leaves) | ||
| Lupinus sparsiflorus (flowers) | ||
| Solanum elaeagnifolium (2 fruits) | Tr. | |
| 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, storage running low.
Den 14.
August 8, 1919. Excellent summer growth all over range. This burrow in mixed growth, grasses and weeds.