Fur bright chestnut-red above, ash-colour beneath : tail half the length of the body; the hairs at the tip a little elongated.

A. riparia, Yarr ell in Proceed, of Zool. Soc. (1832) p. 109. Id. in Loud. Mag. of Nat. Hist. vol. v. p. 598.


Length of the head and body three inches four lines; of the head one inch half a line; of the ears five lines; of the tail one inch eight lines.


Distinguished from the A. agrestis by its brighter and more rufous colour; tail longer, with the hairs at the tip extending beyond the bone; ears rather larger, and more prominent: under parts cinereous, with a faint yellow tinge along the mesial line of the abdomen and on each side of it: tail blackish above, white beneath, the two colours separated by a well-defined line.

First discovered by Mr Yarrell at Birchanger in Essex. Has since occurred in Hertfordshire, Middlesex, Berkshire, and Cambridgeshire, but is not so plentiful as the A. agrestis. Frequents hedge-bottoms and ditch-banks, also occasionally stacks of corn. Is said to construct its nest of wool. - Obs. Independently of the above external differences between this and the last species, there are others connected with their anatomy, which will be found detailed at length in Loud. Mag. 1. c.