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 vertebre, 114; hind foot, 
35; ear from notch, ro.5. Skull: total length, 338;> zygomatic 
width, 20. 
Fam. II]. Mouridee. 
Subfam. I. Murine. 
41. Onyechomys. 
125. c.—yakiensis (Onychomys), Merr., Proc. Biol. Soc. Wash., xv1t, 
1904, p. 124, June g. 
Yaxki More 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 vertebrz, 53; hind foot, 22.5. 
125. d.—canus (Onychomys), Merr., Proc. Biol. Soc. Wash., xvit, 
1904, p. 124, June 9. 
Hoary Moire 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 vertebra, 55; hind foot, 22. 
lewcogaster albescens (Onychomys), Merr., Proc. Biol. Soc. Wash.., 
XVII, 1904, p. 124, June 9. 
SAMALAYUCA Mote Mouse. 
Type locality. Samalayuca, State of Chihuahua, Mexico. 
Genl. Char. Similar to O. 1. 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 vertebre, 60; hind foot, 23. 
