new Bats and Rodents from S. America. 409 



Skull longer than in any of the available specimens of 

 true dancini\ its interorbital region narrow, sharply edged, 

 concave niesially. 



Dimensions of the type (measured in flesh) : — 



Head and body 130 mm.; tail 140; hind foot 28; 

 ear 27. 



Skull: greatest length 34 ; condylo-incisive length 31 '7; 

 zygomatic breadth 17*5 ; nasals 13'7 ; interorbital breadth 4 ; 

 palatilar length 16*2; palatal foramina 8*4; upper molar 

 series 5"8. 



Hah. Las Vacas, Argentine slope of Cordillera opposite 

 Mendoza. Alt. 2500 m. 



Type. Old male. B.M. no. 2.2.5.51. Collected 15th 

 November, 1901, by P. O. Simons, Presented by Oldtield 

 Thomas. 



This Phyllotis, found at the well-known station of Las 

 Vacas, on the Andean route between Mendoza and Santiago^ 

 differs from the true PJi. darwini of the Chilian plains b}^ its 

 rather larger size, longer skull, sharply edged interorbital 

 region, long fur, and buffy-coloured rump. It was also 

 obtained by Philip Gosse at Puente del Inca, about 9000', 

 but there is no evidence as to whether these animals are able 

 to surmount the Andean chain (altitude of pass 12,800') or 

 whether the eastern and western races are now completely 

 isolated. 



None of Philippi's numerous species of " Alus " that are 

 referable to F/>t/IIoiis lUnwihi are inhabitants of the high 

 Andes. 



Phyllotis andium, sp. n. 



Like Ph. haggardi, but tail much longer. 



Size and general characters as in haggardi. Colour a 

 little darker grey on the average, but the difference is neither 

 great nor constant. Under surface dull gre} ish white slightly 

 tinged with buffy. Ears not immensely large, greyish 

 brown. Hands and feet wiiite. Tail considerably and 

 uniformly longer than in haggardi^ biown above, white 

 below. 



Skull slightly larger ajid heavier than in haggardi, smaller 

 than that of darwini, with which it agrees in general 

 proportions. 



Dimensions of the type (measured in flesh) : — 



Head and body 115 mm.; tail 119; hind foot 25; 

 ear 21. 



Skull : greatest length 28'7 ; condylo-incisive length 26-8 ; 

 Ann. iSc Mag. N. Hist. Ser. 8. Vol. x. 28 



