ONYCHOMYS. PEROMYSCUS. 1:!5 



lo ; length of upper tooth row, 4 ; length of mandible, 1 5 ; length of lower 

 tooth row, 4. 



Genus 60. Peroiiiysciis. 



Peromyscus Gloger, Hand- u. Hilfsb. Naturg., i, 1841, pp. xxx, 95. 

 Type Peromyscus arboreus Gloger = Mus sylvaticus novebora- 

 censis Fischer. 



Calomys A.\xd. & Bach., Quad. N. Am., 11, 1851, p. 303. (nee Water- 

 house, 1837.) 



Sitomys Fitzin., Sitzungsb. Math. -Nat. CI. K. Akad. Wiss. Wien, 

 LVi, 1867, p. 97. 



*Vesperimiis Coues, Proc. Acad. Nat. Scien. Phil., 1874, p. 178. 



Baiomys True, Proc. U. S. Nat. ]\Ius., xvi, 1894, p. 758. 



Triiiodontomys Rhoads, Proc. Acad. Nat. Scien. Phit., 1894, p. 



257- 

 Haplomylomys Osgood, Proc. Biol. Soc. Wash., xvii, 1904, p. 53. 



Subgenus A. Baiomys. 



"Size very small. Ascending ramus of mandible short and erect. 

 Condyle terminal coronoid process well developed, uncinate, and near 

 condyle. Plantar tubercles six; soles hairy. Tail short." 



264. Peromyscus taylori (Thomas). 



Hesperomys taylori Thomas, Ann. Mag. Nat. Hist., 5th Ser., xix, 



1887, p. 66. 

 Peromyscus taylori Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 

 1901, p. 141. Zool. Ser. 

 T.wlor's Mouse. 



Type locality. San Diego, Duval County, Texas. 

 Geogr. Distr. Southern Texas. 



265. Peromyscus allex Osgood. 



Peromyscus allex Osgood, Proc. Biol. Soc. Wash., xvii, 1904, p. 



76. Elliot, Mamm. Middle Amer. & W. Indies, F. C. M. Pub., 



IV, Pt. I, 1904, p. 175. Zool. Ser. 

 Dwarf Mouse. 



Type locality. Colima, State of Colima, Mexico. 

 Geogr. Distr. Unknown. 



266. Peromyscus musculus (Merriam). 



Sitomys musculus ^lerr., Proc. Biol. Soc. Wash., viii, 1892, p. 170. 



*A subgenus of Hesperomys Coues. (nee Waterhouse.) 



