| Page | | Importance of rodent groups | 1 | | Investigational methods | 2 | | Identification | 3 | | Description | 5 | | General characters | 5 | | Color | 6 | | Oil gland | 6 | | Measurements and weights | 7 | | Occurrence | 7 | | General distribution | 7 | | Habitat | 7 | | Habits | 9 | | Evidence of presence | 9 | | Mounds | 9 | | Runways and tracks | 10 | | Signals | 11 | | Voice | 12 | | Daily and seasonal activity | 12 | | Pugnacity and sociability | 13 | | Sense developments | 14 | | Movements and attitudes | 15 | | Storing habits | 15 | | Breeding habits | 16 | | Food and storage | 18 | | Burrow systems, or dens | 28 | | Commensals and enemies | 33 | | Commensals | 33 | | Natural checks | 34 | | Parasites | 35 | | Abundance | 36 | | Economic considerations | 36 | | Control | 37 | | Summary | 38 | | Bibliography | 40 |
Note.—This bulletin, a joint contribution of the Bureau of Biological Survey and the Arizona Agricultural Experiment Station, contains a summary of the results of investigations of the relation of a subspecies of kangaroo rat to the carrying capacity of the open ranges, being one phase of a general study of the life histories of rodent groups as they affect agriculture, forestry, and grazing.
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