PEROMYSCUS. 173 



PAGE 



i/ Above cinereous pale brown P. texensis 186 



j.' Above dark plumbeous slate P. t. arizona 186 



k.' Above dark fawn brown P. t. flaccidus 187 



I/ Above drab tinged with burnt umber P. t. dementis 187 



m.' Above dull buffy P. t. coolidgii 187 



n/ Above pale cinereous drab P. t. deserticola 188 



B. Size medium, not under 190 mm. nor over 



230 mm. 

 a. Tail longer than head and body. 



a/ Above light broccoli brown P. tornillo 188 



b/ Above bistre brown P. gymnotis 188 



c/ Above olive buff P. r. pinalis 189 



d/ Above pale yellowish brown and black. 



a." Sides tawny P. martirensis 189 



b." Sides fulvous. 



a.'" Supraorbital bead well developed. 



a.* Ankles brown P. banderanns 189 



b. 4 Ankles sooty black P. b. vicinior 190 



b/" Supraorbital bead obsolete P. b. angelensis 190 



e.' Above grayish cream buff P. stephensi 190 



f.' Above pale yellowish gray and black P. eremicus 191 



g/ Above dark yellowish gray and black. . . .P. e. phaurus 191 



h.' Above pale ochraceous drab and black. . . P. e. arenarius 191 



i.' Above pale ochraceous buff and black. . .P. a. pectoralis 192 



j.' Above pinkish buff and dusky.". P. a. cremicoidcs 192 



k/ Above mixed black and orange buff; tail 



hairy, with pencil P. metallicola 192 



I/ Above dark brown tinged with pale fulvous. 



a." Sides ochraceous P. cedrosensis 185 



b." Sides buffy cinnamon P. difjicilis 193 



c." Sides tawny ochraceous P. bullatus 193 



d/' Sides grayish brown and buff P. sagax 194 



m/ Above fulvous and black, lateral line ful- 

 vous P. yucatanicus 194 



n.' Above darker, lateral line cinnamon ru- 

 fous P. y. badius 194 



o/ Above ash gray and black tinged with 



fulvous P. cineritius 195 



p.' Above grayish brown P. levipes 195 



q.' Above mixed glossy brown and pale yel- 

 lowish brown P. boylii 195 



r/ Above drab gray tinged with ochraceous 



buff P. b. penicillatus 196 



