INDEX. 



[New names in bold-face type; synonyms in italics.] 



Acknowledgments, 10. 

 Arctomys latrans, 8, 14. 



columbianus, 8. 



griseiis, 1!. 



lewisii, 2G. 



ludoviciana, 10, 14. 



ludoviciani, 14. 



ludovicianus, 7, 14. 



missouriensis, 14. 



missuriensis, 14. 

 arizonensis, Cynomys, 8, 19-21. 



cinereus, Cynomys, 14. 

 Citellus, 8, 10, 11. 



fulvus, 11. 

 Colobotis, 11. 

 columbianus, Arctomys, 8. 



Cynomys, 8, 24. 

 Cynomis, 10. 



griseus, 14. 



socialis, 14. 

 Cynomomus, 10. 

 Cynomys (genus), 5, 8, 10, 11. 



(subgenus), 12-23. 

 Cynomys arizonensis, 8, 1&-21. 



cinereus, 14. 



columbianus, 8, 24. 



grisea, 8, 14. 



griseus, 14. 



gunnisoni, 6, 10, 24, 29-31. 

 gunnisonii, 29. 

 leucurus, 6, 8, 10, 24-27. 

 lewisi, 25. 

 lewisii, 25 



ludovicianus, 8, 10, 14^19. 

 mexicanus, 8, 21-23. 

 parvidens, 27-29. 

 pyrrotrichus, 14, 17, 18. 

 socialis, 8, 10, 14. 

 zuniensis, 32-34. 



Distribution, 5. 



Food, 7. 



grisea, Cynomys, 8, 14. 

 griseus, Arctomys, 14. 



Cynomis, 14. 



Cynomys, 14. 



SpermopMlus, 14. 

 gunnisoni, Cynomys, G, 10, 24, 29. 



Cynomys gunnisoni, 29-31. 



SpermopMlus, 8, 29. 

 gunnisonii, Cynomys, 29. 



Habits, 6. 



O 



latrans, Arctomys, 8, 14. 

 lewisi, Cynomys, 25. 

 lewisii, Arctomys, 26. 



Cynomys, 25. 

 Leucocrossuromys (subgenus), 5, 23-34. 

 leucurus, Cynomys, 6, 8, 10, 24-27. 

 ludoviciana, Arctomys, 10, 14. 

 ludoviciani, Arctomys, 14. 

 ludovicianus, Arctomys, 7, 14. 



Cynomys, 8, 10, 14. 



Cynomys ludovicianus, 14-19. 



SpermopMlus, 14. 



Mamcynomiscus, 10. 

 Marmot, Columbia, 17. 



Louisiana, 7, 17. 

 Marmota, 11. 



Measurements, tables of, 34-36. 

 mexicanus, Cynomys, 8, 21-23. 

 missouriensis, Arctomys, 14. 



Monax, 8, 10, 14. 

 missuriensis, Arctomys, 14. 



Monar, 14. 

 Molt, 9. 

 Monar, 10. 



missouriensis, 8, 10, 14. 



missuriensis, 14. 



Natural enemies, 7. 

 Nomenclature, 7-9. 



parvidens, Cynomys, 27-29. 

 Pelage, 9. 

 Petit chien, 5, 8. 

 Prairie-dog, Arizona, 19-21. 



black-tailed, 14-19. 



Gunnison, 29-31. 



Mexican, 21-23. 



Utah, 2"- 29. 



white-tailed, 24-27. 



Zuni, 32-34. 

 pyrrotriclius, Cynomys. 14, 17, 18. 



socialis, Cynomis, 14. 



Cynomys. 8, 10, 14. 

 Specimens examined, 10. 

 SpermopMlus griseus, 14. 



gunnisoni, 8, 29. 



ludovicianus, 14. 

 Squirrel, barking, 5, 8. 



burrowing, 8. 



prairie, 5. 

 Subgenera, 9. 



Tables of measurements, 34-36. 

 Wishronwish, 5. 



zuniensis, Cynomys gunnisoni, 32-34. 



37 



