MUS. 



163 



FIG. 31. Mus RATTUS. 



No. 4670 Field Columbian Mus. Coll. Nat. size. 



UPPER TOOTH ROW. LOWER TOOTH ROW 



Enlarged 4 times. Enlarged 4 times. 



HOUSE MOUSE. 



Type locality. Sweden. 



Geogr. Distr. Cosmopolitan. 



Genl. Char. Tail longer than body; soles naked; size small. 



Color. Above grayish brown, lined with blackish; beneath ashy 

 plumbeous, tinged with reddish; tail dusky; feet ashy brown. 



Measurements. Total length, 170; tail vertebrae, 83; hind foot, 

 18; ear, 13.5. Skull: occipito-nasal length, 20; Hensel, 15; zygo- 

 matic width, 10; interorbital constriction, 3.5; length of nasals, 6; 

 palatal length, 8; length of upper tooth row, 3. 



a. jalapce (Mus), Allen & Chapman, Bull. Am. Mus. Nat. Hist., 



1897, p. 198. 

 JALAPA HOUSE MOUSE. 



Type locality. Jalapa, State of Vera Cruz, Mexico. 



Geogr. Distr. State of Vera Cruz, Mexico, range unknown. 



Genl. Char. General hue dark, dorsal band broad. 



Color. Above black ; sides mouse color ; under parts buffy gray ; 

 tail black; feet and ears brown. 



Measurements. Total length, 164; tail vertebrae, 82; hind foot, 

 18; ear, 14. 



120. rattus (Mus), Linn., Syst. Nat., r, 1758, p. 61; i, 1766, p. 83. 

 Elliot, Syn. N. Am. Mamm., 1901, p. 117. 



