20 
4. Dipodomys deserti Stephens. The largest of the Kanga- 
roo Rats, from the Colorado Desert—very unlike anything 
previously known. 
5. Dipodomys Merriamt Mearns. A smaller Kangaroo Rat, 
from the desert regions of Arizona and Southern California. 
6. Perodipus Richardsoni Allen. A Kangaroo Rat from the 
Indian Territory. 
7. Perodipus compactus True. A pale Kangaroo Rat from 
Padre Island, Coast of Texas. 
8. Heteromys Alleni Coues. A tropical form of spiny Kanga- 
roo Rat, from the valley of the lower Rio Grande, Texas. 
9. Perognathus spinatus Merriam. A pale spiny Pocket 
Mouse from Southern California. 
10. Perognathus femoralis Allen. A dark spiny Pocket 
Mouse from Southern California. 
11. Perognathus paradoxus Merriam. A_ yellowish, bristly 
Pocket Mouse from Texas. 
12. Perognathus longimembris Merriam. A small soft-haired 
Pocket Mouse from Southern California. 
13. Perognathus Merriamt Allen. A small soft-haired Pocket 
Mouse from Texas. 
14. Perognathus Apache Merriam. A very small Pocket 
Mouse from Utah. 
15. Meotoma micropus Baird. This is a recently re-discovered 
“long-lost” species from the coast region of Southern Texas. 
16. Oryzomys aquaticus Allen. A very distinct new form of 
rice-field Mouse from the mouth of the Rio Grande, Texas. 
17. Sigmodonhispidus littoralis Chapman. A newly discovered 
dark coast form of the Cotton Rat from Florida. 
18. Sigmodon Arizone Mearns. A very large pale Cotton Rat 
from Arizona. 
19. Sztomys Taylorti Thomas. A very distinct small form of 
field Mouse from Texas. 
20. Sitomys niveiventris Chapman. A small white-bellied 
field Mouse from South Florida. 
