O.P. PEARSON 1955 4144 ♀ Phyllotis argyros 204 x 110 x 23½ x 22 ear 18 ovens 4145 ♀ " 201 x 103 x 22 x 22 " 19 > 3 lumbs 4146 ♂ zymarum? 179 x 92 x 24½ x 18 testis 4mm Mina, 2200ft; Dept. of Lima, Peru Aug. 26 4147 ♂ Phyllotis darwini brachyurus 255 x 139 x 27 x 27 ear 23 ovens. testis 5mm, S Varwell (25 min. N W Puente Alcornacho) Rio Montano, 8500ft; Dept. of Huancavelica, Peru Aug. 29 4148 ♀ Phyllotis 247 x 128 x 27 x 25 ear 20 ovens 4149 ♀ melanopus? 170 x 77 x 23 x 14 no test. lower molarambi; no eurls. 4150 ♂ Phyllotis 189 x 95 x 25½ x 23 ear 18 ovens 4151 ♀ Hesperomys " 162 x 80 x 19 x 18 test., no eurls. 9500ft 2 min. S Ayacuchco, Dept. of Huancavelica, Peru Aug. 30 4152 ♂ Phyllotis testis 4mm, S small 248 x 135 x 29 x 24 ear 19 ovens 4153 ♂ " testis 5 S Varwell 249 x 139 x 29 x 24 " 20 " 4154 ♀ " 229 x 127 x 28 x 24 " 18 " no eurls. S lumbs. 5 min. 10 min. NE Alcornacho, 8000ft; Dept. of Ayacucho, Peru Sept. 2 4155 ♂ Hesperomys 195 x 96 x 21 x 20 4156 ♂ " 163 x 79 x 18 x 17 Santabarbara de ayacuchco, 12,800ft; Dept. of Ayacucho, Peru Sept. 3 4157 ♂ Phyllotis osbornei testis 6mm 221 x 113 x 24 x 22 S Varwell 4158 ♂ " testis 9 214 x 110 x 26 x 22 S Varwell