Usually with two ridges not close enough together to form a sagittal 

 crest; top profile convex; southeastern states 79. 



79. Color sooty or tawny above; with some white on throat and under parts; 



Fla. 



Geomys fiondanus (Audubon 6? Bachman) Florida Pocket 

 Gopher 

 Color reddish-brown above, buff below; Ga. and Ala. 

 Geomys tuza (Ord) Southern Pocket Gopher 



80. Normal hairs mixed with stiff spines, which are flattened and grooved 



on the anterior side; southern Texas 



Liomys irroratus texensis (Merriam) Texas Spiny Pocket 

 Mouse 

 Not so 81. 



81. Total length of adults nine to twelve inches; tail with a dark stripe be- 



low; usually with a conspicuous light stripe across the thigh; south- 

 western states (A very difficult group, in need of more taxonomic 

 study, separated mainly on range. A few common species are given 

 here.) 82. 



Smaller; tail with no dark stripe below 94. 



82. Usually with a small fifth toe or claw high on the inside of the foot 83. 

 Usually with only four toes 90. 



83. From Oregon southward alone the Cal., Nevada and Ari^. border into 



Texas and Mexico 84. 



Primarily in Cal. 85. 



84. Lower incisors flat, chisel-shaped; Nevada region 



D^podomys microps (Merriam) Chisel-toothed Kangaroo Rat 

 Lower incisors rounded; Oregon to Texas 



Dipodomys ordii Woodhouse Ord's Kangaroo Rat 



85. In the southern part of Cal., from San Bernardino and Kern Counties 



southward, on the desert slopes of the mountains 



Dipodomys agilis Gambel Nimble Kangaroo Rat 

 North of San Bernardino, or in the Mohave or Panamint areas 86. 



86. Large, about fourteen inches in total length; tail not much longer than 



rest of animal; southwest border of San Joaquin Valley, Cal. 

 Dipodomys ingens (Merriam) Giant Kangaroo Rat 

 Smaller, ten to twelve inches in total length; tail usually almost twice as 

 long as the body 87. 



87. From southern Oregon to Santa Barbara county, Cal., between the Sier- 



ra Nevada and the coastal Redwood belt 



Dipodomys heermanni Le Conte Heermann Kangaroo Rat 

 South and west of the above range 88. 



88. In the Mohave Desert and lower Owens Valley, Cal. 



Dipodomys mohavensis Grinnell Mohave Kangaroo Rat 

 Not so 89. 



89. At the head of Owens Valley and in the northern Panamint Mts. 



Dipodomys panamintinus (Merriam) Panamint Kangaroo Rat 



513 



