Phyllotis darwini (Waterhouse, 1837) . Proc. Zool. Soc. Lond., 1837:28.

TYPE LOCALITY: Chile, Coquimbo Prov., Coquimbo .

DISTRIBUTION: C Peru (Junfn), south through W Bolivia, to C Chile and WC Argentina.

SYNONYMS: abrocodon, arenarius, boedeckeri, campestris, capito, chilensis, dichrous, fulvescens, glirinus, griseoflavus (of Philippi, 1900), illapelinus, lanatus, limatus, megalotis, melanotis, melanotus, mollis, platytarsus, posticalis, ricarulus, rupestris, segethi .

COMMENTS: See accounts of P. bonaeriensis, P. caprinus, P. definitus, P. magister, P. osgoodi, P. wolffsohni, and P. xanthopygus, previously arrayed as subspecies of P. darwini by Pearson (1958) and /or Hershkovitz (1962), for references addressing their specific status. The complexity of populations comprising this species urges still further revisionary attention.