Mus tenellus (Thomas, 1903) . Proc. Zool. Soc. Lond., 1903(1):298.

TYPE LOCALITY: Sudan, Blue Nile, Roseires .

DISTRIBUTION: Sudan, S Ethiopia (below 2000 m; Rupp, 1980), S Somalia, and south through Kenya to C Tanzania (Dodoma); limits unknown.

SYNONYMS: aequatorius, delamensis, gerbillus, suahelica.

COMMENTS: Subgenus Nannomys . Reviewed by Petter (1972«) and Yalden et al. (1976). Morphologically and ecologically closely similar to M. haussa (see that account). The southernmost record is based on the holotype of gerbillus (Allen and Loveridge, 1933), which is an example of M. tenellus . Yalden et al. (1976) listed gallarum as a synonym of M. tenellus, but the holotype is an example of M. musculoides . Judged by our studies of museum specimens, most published Ethiopian records of M. tenellus are actually M. musculoides .