:>4-_* PEROMYSCUS. 



Family IV. Miirida*. 



Subfamily 1 1 . Cricetinse. 

 Genus 60. IVroinysous. 



278aa. I'n-nin ijxcn x I <-uc<>}>it x fiixns Bangs. 



Peromyscns Icuccpns jiisns Bangs, N. Eng. Zool. Club, iv, 



P- 13- 



MARTHA'S VINEYARD ISLAND DEER MOUSE. 



Type loeiility. \\'cst Tisbury, Martha's Vineyard Island, Massa- 

 chusetts. 



Geogr. Distr. Martha's Vineyard Island, Massachusetts. 



Genl. Char. Similar to P. I. noveboracensis, but larger. 



Color. Summer Pelage. Above rich brown, dorsal region darkest ; 

 beneath white; hands and feet white; ears dusky; tail blackish above, 

 white below. 



Measurements. Total length, 187-203; tail vertebrae, 85-9(1; 

 hind foot, 21.5-23.5. Skull: basal length, 25.8; occipito -nasal length, 

 28.4; length of nasals, 10.6; palatal length, 11.4; zygomatic width, 

 [4.6; interorbital width, 4.4; length of mandible, 15.8; of upper 

 molar series, 3.8; of lower molar series, 3.6. 



278aaa. /'/'/-oni i/xt-its //// >-n/>// * <t in inml ijtrx Bangs. 



Peromyscns leucopus ammodytes Bangs, Proc. N. Eng. Zool. Club, 



iv. 1905, p. 14. 

 MOXOMOV ISLAND DEER MOUSE. 



Type locality. Monomoy Island, Massachusetts. 



Geogr. Distr. Known only from the type locality. 



Genl. Clhir. Smaller and paler than /'. /. noveboracensis. 



Color. Above pale gray, beneath white; ill-defined dorsal stripe 

 vmetimes present; hands and feet white; tail pale gray above, white 

 be-low, ears pale drab. 



Measurement*. Total length, 151.5-188; tail vertebra?, fiy-SS; 

 hind foot, 18.8-21. Skull: basal length, 23.8; occipito-nasaJ length, 

 26; length of nasals, 10; palatal length, 10.4; zygomatic width. 13.6; 

 interorbital width, 4; length ol mandible, 14.2; length of upper molar 

 series, 3.4; of lower molar series, 3. 



