Plate IV. 



(About natural size.) 



Fig. 1. Cynomys leucurus Merriam. ad. Cumberland, Wyoming. (No. 



179515, U. S. Nat. Mus., Biological Survey collection.) 

 Fig. 2. Cynomys parvidens Allen. 9 ad. Buckskin Valley, Utah. (No. 158994, 



U. S. Nat. Mus., Biological Survey collection.) 

 Fig. 3. Cynomys gunnisoni gunnisoni (Baird). c? ad. Saguache, Colorado. (No. 



176695, U. S. Nat. Mus., Biological Survey collection.) 

 Fig. 4. Cynomys gunnisoni zuniensis Hollister. J' ad. Wingate, New Mexico. 



(Type, No. 137555, U. S. Nat. Mus., Biological Survey collection.) 



