742 APPENDIX. 



Color. Above gray, suffused with fulvous; median dorsal stripe 

 from crown to base of tail black; lateral dorsal stripes short mixed 

 fulvous, gray, and black; inner pair of light stripes ashy gray, outer 

 whitish gray; sides pale rusty fulvous; tail above mixed gray and 

 black, fringed with whitish gray, beneath in center and on anal 

 region dark orange rufous; stripes on head and the ears, like 

 T. dorsalis. 



Measurements. Total length, 254; tail vertebrae, 114; hind foot, 

 35; ear from notch, 19.5. Skull: total length, 38; zygomatic 

 width, 20. 



Fam. III. Huridie. 



Subfam. I. Murinee. 



41. Oiiychomys. 



125. c. yakiensis (Onychomys),M.err., Proc. Biol. Soc. Wash., xvn, 

 1904, p. 124, June 9. 



YAKI MOLE MOUSE. 



Type locality. Camoa, Rio Mayo, State of Sonora, Mexico. 



Geogr. Distr. Western part of State of Sonora, and northern part 

 of State of Sinaloa. 



Genl. Char. Similar to O. ramona, but slightly larger; dorsal area 

 darker; molar teeth broader and heavier and palate usually with a 

 median projection. 



Measurements. Total length, 154; tail vertebras, 53 ; hind foot, 22.5. 



125. d. canus (Onychomys}, Merr., Proc. Biol. Soc. Wash., xvn, 

 1904, p. 124, June 9. 



HOARY MOLE MOUSE. 



Type locality. San Juan Capistrano, State of Zacatecas, Mexico. 



Geogr. Distr. States of Zacatecas and San Luis Potosi. 



Genl. Char. Similar to O. torridus, with longer tail and ears, and 

 color drab gray or grayish clay color instead of fulvous. 



Measurements. Total length, 152 ; tail vertebras, 55 ; hind foot, 22. 



leucogaster albescens (Onychomys), Merr., Proc. Biol. Soc. Wash., 

 xvii, 1904, p. 124, June 9. 



SAMALAYUCA MOLE MOUSE. 



Type locality. Samalayuca, State of Chihuahua, Mexico. 



Genl. Char. Similar to O. I. pallescens, but paler and with cheeks 

 and thighs snowy white, and a smaller and weaker skull. 



Color. Upper parts buffy, deepest on rump; face from nose to 

 eyes whitish washed slightly with buff; cheeks, legs, and thighs snow 

 white like under parts. 



Measurements. Total length, 160; tail vertebrae, 60; hind foot, 23. 



