ee? ?- 
PEROGNATHUS. 365 
Color. Upper parts and sides hair brown; lateral line fawn; 
under parts soiled white; tail black above, whitish beneath; ears 
dusky. 
Measurements. Total length, 182; tail vertebrz, 104; hind foot, 
23; ear, 8. Skull: occipito-nasal length, 26; Hensel, 18; greatest 
mastoid breadth, 13.8; length of parietal, 3.5; greatest width of 
interparietal, 7.6; interorbital constriction, 6.7; length of nasals, ro. 
a.—canescens (Perognathus), Merr., Proc. Acad. Nat. Scien. Phil., 
1894, p. 267. : 
JaRAL Pocket Mouse. 
Type locality. Jaral, State of Coahuila, Mexico. 
Geogr. Distr. Known only from type locality. 
Genl. Char. Similar to P. intermedius; larger and more grayish. 
Color. Upper parts drab gray; lateral line pinkish buff; under 
parts white; tail mouse gray above, white beneath. 
Measurements. Total length, 193; tail vertebre, 117; hind foot, 
22. Skull: occipito-nasal length, 25; Hensel, 17.5; greatest mastoid 
breadth, 13.5; length of interparietal, 37; greatest width of inter- 
parietal, 7.2; interorbital constriction, 6.1; length of nasals, 9.3. 
371. goldmani (Perognathus), Osgood, N. Am. Faun., No. 18, 1900, 
P- 54- 
GOLDMAN’s Pocket MOUusE. 
Type locality. Sinaloa, State of Sinaloa, Mexico. 
Geogr. Distr. States of Sonora and Sinaloa, Mexico; coast 
plains. 
Genl. Char. Size large; ears large; similar in color to P. nelsont. 
Color. Upper parts broccoli brown, darkened on anterior half 
with black; lateral line pinkish buff; ear whitish exteriorly for 
apical half; under parts white; tail blackish above, white below. 
Measurements. Total length, 202; tail vertebre, 108; hind foot, 
28. Skull: occipito-nasal length, 27.7; Hensel, 20.6; greatest mas- 
toid width, 14.3; length of interparietal, 3.8; greatest width of inter- 
parietal, 6.5; interorbital constriction, 6.5; length of nasals, 11.1. 
a.—artus (Perognathus), Osgood, N. Am. Faun., No. 18, 1900, 
P- 55: 
Batopitas Pocket Mouse. 
Type locality. Batopilas, State of Chihuahua, Mexico. 
Geogr. Distr. States of Chihuahua, Durango, and _ Sinaloa, 
Mexico. 
Genl. Char. Similar to P. goldmant; rump bristles undeveloped; 
slight cranial differences. 
