Order INSECTIVORA The 

 Insectivores 



Famay SORICIDAE, Shrews 



Subfamily SORICINAE 



DOBSON'S SHREW 



SOREX DOBSONI (Merriam) 



Sorex dobsoni Merriam, N. A. Faun. No. 5, p. 33, 1891. 

 Sorex vagrans dobsoni Elliot, Syn. N. Am. Mamm., F. C. M. 

 Pub., 1901, p. 370. 



Description — Similar to S. personatus in size and color- 

 ation, but differing in having a somewhat longer tail and 

 in cranial and dental characters. Upper parts uniform dull 

 sepia brown, not darker on the rump. Under parts drab 

 slightly tinged with brown. Tail indistinctly bicolor, con- 

 color with the upper and under surfaces of the nody. The 

 skull is larger and heavier than that of S. personatus. 

 (Merriam.) 



Distribution — Rocky mountains in northern Idaho, and 

 western Montana, also in Big Snowy and Prior mountains, 

 Montana, Big Horn mountains in Wyoming, and Wasatch 

 mountains, Utah. 



MASKED SHREW 



SOREX PERSONATUS (1. Geoff. St. Hilaire) 



Sorex personatus 1. Goeff. St. Hil., Mem. du Mus. Hist. Nat. 



Paris, XV, 1827, p. 122. 

 Sorex forsteri Rich., Zool. Jour., Ill, 1828, p. 516. 

 Sorex cooperi Bachm., Journ. Acad. Nat. Sci. Phila., 1837, 



p. 388. 

 Sorex fimbripes Bachm., Journ. Acad. Nat. Sci. Phil., 1837, 

 Amphisorex lesueuri Duvern., Mag. Zool., Mamm., 1842, p. 33. 

 Sorex platyrhynchus Linsley, Sillim. Am. Journ. Scien. XLIII, 



1842, p. 346. 

 Otisorex platyrhinus DeKay, Zool. N. Y., I, 1842, p. 22. 

 Sorex haydeni Baird, N. Am. Mamm, 1857, p. 29. 

 Sorex richardsoni Dobson, Mon. Insectiv., I, 1890, Ft. 111. 

 Sorex idahoensis Merr., N. Am. Faun., No. 5, 1891, p. 32. 



Description — The summer coat, above, sepia brown 

 mixed with dark-tipped hairs; shaded into ashy white or 

 fawn below; tail, dark brownish above and all around at 



