ARVICOLA 735 



6. Leguevin, Haute- 0. Thomas (p). 8.9.1.77. 



Garonne. (A. Robert.) 



9. St. Gilles, Gard, France. G. S. Miller (c). 8. 8. 4. 2G1. 



a J, juv. Valescure, Var, France. G. S. Miller (c). 8. 8. 4. 257-260. 



6 2. Var. Purchased (Par- 52. 5. 27. 44-45. 



zudaki). 



Arvicola sapidus tenebricus Miller. 



1884. Microtus musiniani Lataste, Actes Soc. Linn. Bordeaux xxxviii, 

 p. 37 (part). Not Arvicola musignani de S61ys-Lougchanips. 



1908. Arvicola tenebricus Miller, Ann. and Mag. Nat. Hist., 8th ser., i, 

 p. 196, February, 1908. Type in British Museum. 



1910. Arvicola sapidus tenebricus Miller, Proc. Biol. Soc. Washington, 

 XXIII, p. 20, March 23, 1910. 



1910. Arvicola sapidus tenebricus Trouessart, Fauna Mamm. d'Europc, 



p. X. 



Type locality. — Vicinity of Biarritz, Basses-Pyrenees, France. 



Geographical distribution. — Pyrenees and Atlantic coast I'egion 

 of south-western France, north to the Garonne ; northern limit 

 of range not known ; two specimens from La Coruna, Spain, 

 appear to be referable to this race rather than to true sapidus. 



Diagnosis. — Colour darker than in A. sapidus sapidus (essen- 

 tially like that of A. amphibius ampliihius), the sides and face 

 conspicuously sprinkled with black-tipped hairs. 



Colour. — Upper pai'ts a dull greyish buff, so heavily overlaid 

 with black that the general effect is usually not far from a rather 

 light grizzled bister on back and a greyish wood-brown on sides, 

 the cheeks and sides noticeably sprinkled with black-tipped hairs ; 

 underparts slaty grey, washed with light ochraceous-buff" on chest 

 and belly ; feet hair-brown ; tail blackish above, greyish below, 

 seldom distinctly bicolor. 



Measurements. — External measurements of type (adult male) : 

 head and body, 193 ; tail, 112 ; hind foot, 34 ; ear, 17. Average 

 and extremes of five adults from the type locality : head and body, 

 197-4,(193-202); tail, 118-5 (112-124) ; hind foot, 34-4 (33-36) ; 

 ear, 17 '2 (17-18). For cranial measurements see Table, p. 737. 



Specimens examined. — Twenty-seven, from the following localities : — 

 France : — Port6, Pyrenees-Orientales, 2 ; I'Hospitalet, Ariege, 2 ; Luchon, 

 Haute-Garonne, 2 ; Montrejeau, Haute-Garonne, 5 (U.S.N. Si.) ; Biarritz, 

 Basses-Pyr6u6es, 7 ; Cadillac, Giroude, G (U.S.N.M.) ; Barsac, Giroude, 1 

 (Lataste). 



Spain : — Coruua, Galicia, 2. 



2 6. Port(5, Pyrenees - Orien- G. S. Miller (c). 8. 8. 4. 254-255. 

 tales, Prance. 

 6. L'Hospitalet, Ariege. G. S. Miller (c). 8. 8. 4. 256. 



6 juv. L'Hospitalet, Ariege. O. Thomas (p). 8. 9. 1. 71. 



(A. Robert). 

 5 (5, 2 9. Biarritz, Basses-Pyren6es. J. P. Davison (p). 0. 1. 21. 5-6. 



6. 6. 4. 10-14. 

 (6. 1. 21. 5. Type of subspecies.) 

 2. Coruua, Galicia, Spain. Dr. V. L. Seoane 93. 12. 15. 1. 



(p). 95. 6. 25. 1. 



