100 Mr. G. S. Miller o« <Ae 



I'Hospitalet, Arie^^e, France, altituele 4800 feet, August 27, 

 1906, by G. S. Miller. Original number 7082. 



Geoprnphical distribution. — Pyrenees ; at present known 

 from the eastern half of French side only (Pyrenees Orientalcs, 

 Ariege, and Hautes Pyrenees). 



Characters. — Similar to Microtus nivalis nivalis, but 

 anterior loop of first lower molar broadly crescentic in 

 outline, the posterior external salient angle broad and 

 rounded, occasionally obsolete. 



Measurements. — Type: head and body 111 mm. ; tail 59; 

 hind foot 21; ear from meatus 16. Skull: condylo-basal 

 length 28 ; zygomatic breadth 17"4; interorbital constriction 

 4*27 ; occipital breadth 14 ; occipital depth (median) 7'8 ; 

 nasal 8-6 ; diastema 9*2 ; mandible 186 ; maxillary tooth- 

 row 7*0 : mandibular tooth-row 7"0. 



Remarks. — Among the fourteen skulls examined there is not 

 a specimen which shows any near approach to the characters 

 of the typical Alpine race. As already pointed out, the form 

 of the anterior loop of the first lower molar in the Pyrenean 

 animal is essentially duplicated in specimens from Tyrol and 

 the Apennines. 



Microtus ulpius, sp. n. 



Ttjpe.— Adult female (skin and skull). B.M. no. 3. 2. 2. 48. 

 Collected at altitude of 2000 feet near Hatszeg, Hunyad, 

 Eastern Hungary, November 20, 1902, by C. G. Danford. 

 Original number 13. 



Geographical distribution. — Known only from the vicinity 

 of the type locality, but probably occurring throughout the 

 Transylvanian Alps, and perhaps in the true Carpathians 

 also. 



Characters. — Similar to Microtus nivalis, but colour darker 

 and tail usually brown above (often distinctly bicolor 

 throughout); posterior border of palate with median ridge 

 sharply defined, its width less than that of deep lateral pit ; 

 anterior loop of first lower molar as in M. nivalis aquitanius. 



Measurements. — Type : head and body 131 mm. ; tail 58 ; 

 hind foot 20; ear 17. Skull: condylo-basal length 30-4; 

 zygomatic breadth 18; interorbital constriction 4*4; occi- 

 pital breadth 15; occipital depth (median) 7-4; nasal 8-0 ; 

 diastema 92; mandible 19"4; maxillary tooth-row 7'2 ; 

 mandibular tooth-row 7 0. 



Remarks. — This species is well differentiated from Microtus 

 nivalis by the peculiar form of the palate and by the dark 

 colour of the upperparts. Among the thirteen skins ex- 

 amined all show traces of brown on the upper surface of the 



