412 



THE GENUS DIPODOMYS. 



This diagnosis, which is the converse of that given for D. phillipsi 

 {typicus), is applicable throughout to my five-toed series, although it 

 includes a specimen (No. 7348) coming under Dr. Coues' B. philUpsi 

 (typicus). 



It is also to be observed that the proportion of the tail to the head 

 and body, which Dr. Ooues places at 150 : 100 for D. philUpsi (typicus)y 

 rises to 184:100 in my four-toed series. 



In addition, the eyes and ears are relatively larger and further re- 

 moved from the extremity of the snout in the four toed series than in 

 the five- toed specimens. 



The differences of color which Dr. Coues places among the "observed 

 matters of fact, not open to question," I am unable to appreciate in the 

 material at command. I cannot picture in my mind the difference 

 between mouse- brown lightened with tawny, or fulvous, on the one hand, 

 and tawny, or fulvous, deepened with mouse-brown, on the other. In the 

 series of skins as a whole I find only — so far as color is concerned — that 

 insensible blending of differences which Dr. Coues insists upon. I be- 

 lieve that it would be impossible to classify subspeciflcally any single 

 specimen by its color alone. 



The localities from which the specimens having, resi)ectively, four 

 toes and five toes on the hind foot were derived are as follows : 



D. PHiLLipei (4 toes). 



D. AGiLis (5 toes). 



4970. 



2628. 



4922. 



4923. 



2626. 

 12408. 

 12730. 



1741. 



1742. 

 491. 



7182. 

 14641. 



4015. 



8855. 



8856. 

 12382. 

 13585. 

 14640. 



n. n. 



n. n. 



4170. 



(Ale.) 



Cape St. Lucas, Lower California. 

 Southern California. (A.lc.) 

 Mohave village, Arizona, (Ale.) 

 Mohave village, Ariziona (juv.). (Ale.) 

 Fort Keadini;, California. (Ale.) 

 Rocky Mountains. (Ale.) 

 New Mexico. (Ale.) 

 Pecos, New Mexico. (Skin.) 

 Pecos, Nl'W Mexico. (Skin.) 

 Llano Estacado. (Skin.) 

 Fort Mohave, (Colorado River. 

 Fort Cummings, New Mexico. 

 Pecos River, Texas. (Mounted.) 

 Camp Grant, Arizona. (Skin.) 

 Camp Grant, Arizona. (Skin.) 

 Fort MeRae, New Mexico. (Skin.) 

 San Jos6, Lower California. (Skin). 

 Fort Cummings, New Mexico. (Skin.) 

 Eastern Mexico. (Skin.) 

 Eastern Mexico. (Skin.) 

 ? Fort Crook, California. (Skin.) 



(Skin.) 

 (Mounted.) 



7347. Running Water, Nebraska. (Ale.) 

 14064. Fort Walla Walla, Wash. Ter. (Ale.) 

 2G25. San Francisco, California. (Ale.) 



7344. Platte Valley, Nebraska. (Ale.) 

 9478. Washington Territory. (Ale.) 



7345. Crossing Little. Colorado. (Ale.) 

 7.^48. Fort Tejon, California. (Ale.) 



4870. Fort Laramie, Wyoming. (Ale.) 

 15110. Arizona. (Ale.) 



4871. Cimarron, Now Mexico. (Ale.) 



8436. Fort Whipple, Arizona. (Skin.) 

 1739. Pecos, Texas. (Skin.) 



9282. Fort Cobb, Arkansas. (Skin.) 



8437. Fort Whipple, Arizona. (Skin.) 

 143. Souora. (Skin.) 



7825. Bill Williams Mountains, Arizona. (Skin.) 

 3046. Three hundred miles from Fort Riley, 

 n. n. South Platte River. (Skin.) 

 995. Fort Walla Walla, Wash. Ter. (Skin.) 

 943. 9 Los Angeles, California. (Skin.) 



1062. San Diego, California. (Skin.) 

 7181. California. (Skm.) 



1063. San Diego, Calilornia. (Skin.) 

 3159. Fort Laramie, Wyoming. (Skin.) 



11661. Ponipey's Pillar, Tellowstone R. (Skin.) 

 11663. Month of Powder River, Montana. (Skin.) 



3771. Camp Floyd, Utah. (Skin.) 



n. n. Powder River, Montana. (Skin.) 



11662. Mouth of Powder River, Montana. (Skin.) 

 14805. Trego County, Kansas. (Skin.) 



21658. Trego County, Kansas. (Skeleton.) 

 14009. Lee'.s Ferry, Colorado River, Ariz. (Skin.) 

 13.572. (2) Fort Dehance. (Skin.) 

 9608. Don Carlos, Colorado. (.Skin.) 

 12668. Camp Harney, Oregon. (Skin.) 

 12441. San Diego, Calitoruia. (Skin.) 

 489. ? Monterey, California. (.Skin.) 

 473. Posa Creek, California. (Mounted.) 

 472. Posa Creek, California. (Mounted.) 

 442. Huerfano River, New Mexico. (Mounted.) 

 1044. Mesiila Valley, New Mexico. (Mounted.) 

 2621. Coahuila, Mexico. (Ale.) 

 372. Durango, Mexico. (Mounted.) 



