88 MICROTDS. 



Microtus miurus ().s<j^oo(I. Biological Survey collection. 



North AiiuT. FauiKi, No. L'l, pp. 04-66, September 26, 190!. 



107175. Skill iiiid skull. Adult male. Head of Boar Creek, near 

 Hope, Turnaoaiii Arm, Cook Inlet, Alaska. Sept(>nil)er 4, iy»M». 

 Collected by W. H. Osgood and E. Heller. Original number 134i>. 



Well-made skin in good condition; nkull i)erfect, except for slight perforation 

 in right frontal. 



Arvicola modesta Baird. 



Mammals of North America, p. 535, 1857. 

 = Microtus pennsylvanicus modestus (Baird). See Bailey, North Amer. Fanna, 

 No. 17, p. 20, .InneB, 1900. 



iVVt Skin and skull. Immature. Sawatch Pass, Rock}^ Mountains, 

 near Cochetopa Pass, Saguache County, Colorado. Collected b}' 

 Mr. Kreutzfeldt. Original number 16. Pacific Railroad Surve}'' 

 near 38° lat., Lieut. E. G. Beckwith, U. S. A. Catalogued March 

 19, 1855. 



Skin very fragmentary and dilapidated. Right fore foot still attached. Two 

 other feet loose and also tip of tail. Skull young; ends of nasals and upper 

 incisors broken, both malars, all the occipital bones, the interparietal and most 

 of the parietals missing. Left half of the inandi})le has anguhir and coronoid 

 processes broken away; right half, part of angular process and entire coronoid 

 missing. 



Of Baird's two specimens, both designated l>y numbers, the above is the only 

 one that he refers with certainty to modestn. 



Arvicola montana Peale. See page 289. 



Arvicola montosa True. 



Proc. U. S. Nat. :\Ius., XVII, No. 976, p. 11, May 8, 1894. 

 = Microtus montosus (True). See Miller, Proc. Acad. Nat. Sci. Pliila., 1899, p. 

 293, August 9, 1899. 



fU^I- Skinandskull. Half -grown male. Central Kashnnr. altitude 

 11,000 feet. October 4, 1891. Collected by Dr. W. L. Abbott. 

 Catalogued May 9, 1892. 



Well-made skin in good t;oudition, but rather i-ontracted posteriorly; skull 

 injured about the pterygoids, a hole in right bulla, and both coronoid processes 

 of mandible broken; otherwise perfect. 



Arvicola (Mynomes) mordax Merriam. Biological Surve}' coll. 



North Amer. Fauna, No. 5, pp. 61-62, pi. 2, ligs. 3-4, July 30, 1891. 

 = Microtus mordax (Merriam). See Trouessart, Catalogus Mammalium, p. 564, 

 1897. 



fjigg. Skin and skull. Adult male. Sawtooth Lake, Idaho. Sep- 

 tember 29, 1890. Collected by Dr. C. Hart Merriam and V. Bailey. 

 Original number 1908. 



Well-made skin in good condition; skull perfect. 



