Note 98 — Chapter III · Concluding the Route to the Great Salt Lake City.
Reading edition
I had no opportunity of observing this clean, pretty, and vivacious little animal, whose chirruping resembles that of a bird; but it appeared to be quite a different species from the common striped and spotted prairie-squirrel (Spermophilus tredecimlineatus), or the chipmonk or chipmuk (S. striatus).