Mammals from Jtijuy. 611 



4. Oryzomys sp. 



S. 1462, 1476, 1494 ; ? . 1471, 1474, 1483, 1498, 1502. 

 Higueiilla, 2000 m. 



5. Andinomys edax, Thos. 



S. 1414, 1417. Alfarcito, 2600 m. 



c?. 1429; ? . 1432. Siena de Zenta, 4500 m. 



6. Phyllotis nogalaris, sp. n. 



S. 1472,1485. Higiierilla, 2000 m. 



A large species of ratlier dark coloui". 



Size large, only exceeded by Ph. magister. General colour 

 of the usual grizzled greyish, but darker than usual, about 

 as in dark specimens o£ Ph. tucunianus. Under surface dull 

 Avhitisli, slightly tinged witii buffy, which may form a definite 

 patch on the chest. Ears rather smaller than usual, daik 

 brown. Hands and feet white. Tail long, blackish above 

 and at the end, dull white for the proximal half below. 



Skull nearly as large as that of magister, its upper outline 

 evenly convex, the middle part of the skull higli. Inter- 

 orbital region very narrow, with well-marked vertically pro- 

 jecting edges, which add to the vertical height of the skull ; 

 tiiese, however, have no resemblance to the divergent hori- 

 zontal beads characteristic of the genus Oraomys. Zygomatic 

 plate with sharply cut straight front edge. BuIIeb propor- 

 tionately rather small. 



Dimensions of the type : — 



Head and body 147 mm.; tail 164; hind foot 30; 

 ear 23. 



Skull: greatest length 35; condylo-incisive length 32'5 ; 

 zygomatic breadth 19 ; nasals 14'5 X 5; intertemporal breadth 

 3'3 ; breadth of brain-case 15; height of crown from alveolus 

 of m^ 10'6 ; palatilar length 16 ; palatal foramina 8*5 ; 

 upper molar series 5. 



Mob. as above. 



Type. Adult male. B.M. no. 21. 11. 1. 22. Original num- 

 ber 1472. Collected 29th .May, 1921. 



Distinguishable by its size and comparatively dark colour. 



" ^ Hata de los nogales.' — I call it this because it was only 

 found where there are nogales ( = walnuts). — Appears to be 

 rare."— £■. B. 



7. Phyllotis ricardulus, Thos. 



S . 1407, 1412 ; ? . 1415, 1420, 1424. Alfarcito, 2600 m. 

 cJ . 1454. Sierra de Zenta, 4500 m. 



