Both in size and form considerable variability is displayed, the species of Holochilus being some of the largest, while the common white-footed mouse (Eligmodon leucopus) of North America is one of the smaller forms. Some kinds, such as Oryzomys and Peromyscus have long, rat-like tails, while others, like Acodon, are short-tailed and more volelike in appearance.
There are several varieties of grasshopper mice (Orychomys), white-footed mice (Peromyscus), harvest mice (Reithrodontomys), rice-rats (Oryzomys), wood-rats (Neotoma), voles (Microtus), &c. Bats inhabit caves in Burnet, Williamson, Lampasas, Gillespie and other counties.
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