[Illustration: PLATE V. FIG. 1.--CLEARING ABOUT A MOUND.

A typical clearing about a mound of _Dipodomys s. spectabilis_, showing
the autumnal denudation of the mound and surrounding areas. In this
instance about 30 feet in diameter.]

[Illustration: PLATE V. FIG. 2.--MOUND AND RUNWAYS.

A small mound of _Dipodomys s. spectabilis_ in early autumn, showing
runways radiating from the den. Evidences of activity may be noted in
and about the surface of the mound.]


[Illustration: PLATE VI. FIG. 1.--RUNWAY OF DIPODOMYS S. SPECTABILIS.

Well-traveled path leading from the main den, in the foreground, to a
subsidiary burrow (see Fig. 2, below), about 30 feet distant, at
apparent end of runway.]

[Illustration: PLATE VI. FIG. 2.--SUBSIDIARY BURROW OF DIPODOMYS S.
SPECTABILIS.

Located at the end of the 30-foot runway shown in Figure 1, above. This
has three openings, two in the foreground and the third a little to the
rear and indicated by an arrow.]


SIGNALS.