Plate V. 



[Natural size; all from U. S. Nat. Mus., Biological Survey collection, except fig. 2.] 



Fig. 1. Thomomys perpallidus albatus, topotype, Fort Yuma, Cal. (No. 99528.) 



2. Thomomys perpallidus perpallidus, , topotype, Palm Springs, Cal. (No. 4, 



collection of Dr. William Bebb.) 



3. Thomomys perpallidus perpes, J' , type. Lone Pine, Cal. (No. 32503.) 



4. Thomomys operarius, , type, Keeler, Cal. (No. 32466.) 



5. Thomomys perpallidus aureus, c? , topotype, Bluff, Utah. (No. 57155.^ 



6. Thomomys perpallidus canus, <^ , type, Deep Hole, Nev. (No. 78365.) 



7. Thomomys latirostris, , type. Painted Desert, Ariz. (No. 24914.) 



8. Thomomys cab ezonse, c? , type, Cabezon, Cal. (No. 53989.) 



9. Thomomys alpinus awahnee, 9 , type, Yosemite Valley, Cal. (No. 133076.) 



10. Thomomys bottxmewa, c? , type, Raymond, Cal. (No. 133183.) 



11. Thomomys bottse anitae, c? , topotype, Santa Anita, Lower California. (No. 



146831. ) 



12. Thomomys mag dalense, c? , type, Magdalena Island, Lower California. (No. 



146832. ) 



13. Thomomys alpinus alpinus, c? , type, Mount Whitney, Cal. (No. 42512.) 



14. Thomomys jacinteus, c? , San Jacinto Mountains (Tahquitz Valley), Cal. (No. 



126469.) 



15. Thomomys neglec f us, J", type, San Antonio Mountains, Cal. (No. 137869.) 



16. Thomomys bottse nigricans, c? , topotype. Witch Creek, Cal. (No. 148685.) 



