MICROTUS. 303 
matic breadth, 17.5; interorbital constriction, 3; length of nasals, 8.5; 
palatal length, 14.5; mastoid breadth, 14; width of braincase above 
auditory meatus, 10; length of upper tooth row, alveolar border, 6.5. 
B. Pitymys. 
Palate normal; lower third molar without closed triangles; lower 
first molar with five closed triangles and nine salient angles; upper 
third molar with two or three closed triangles and six salient angles; 
mamme, four inguinal; plantar tubercles, five; soles hairy. 
Fig. 52. MicROTUS (PITYMYS) QUASIATER. 
No. 5064 Field Columbian Mus. Coll Enlarged %. 
UPPER TOOTH ROW. LOWER TOOTH ROW. 
Enlarged 7 umes. Enlarged 7 times. 
305. quasiater (Arvicola), Coues, Proc. Acad. Nat. Scien. Phil., 
Aww. EOE. 
CouveEs’ MEAapow VOLE. 
Type locality. Jalapa, State of Vera Cruz, Mexico. 
Geogr. Distr. State of Vera Cruz, Mexico. 
Genl. Char. Similar to M. pinetorum, but darker. 
Color. Upper parts dark chestnut brown; beneath blackish ash, 
hoary in certain lights; tail above like the back, possibly a little 
darker; hands and feet brownish. 
