March, [904. Mammals of Southern California — Elliot. 305 



Perodipus agilis streatori. 



Perodipus streatori Merr., Proc. Biol. Soc. Wash., 1894, p. 113. 

 Elliot, Syn. N. Am. Mamm., in, 1Q03, p. 237. 



10 Specimens: 2 North of Canada de las Uvas, 3 Rose Sta- 

 tion, 5 Neenach. 



'■An abundant race in the San Joaquin Valley in grain-fields 

 near Rose Station at the mouth of the Canada de las Uvas. At 

 the western base of the Tehachapi Mountains they become 

 smaller and darker, grading into P. agilis." In view of the fact 

 just stated, it would seem that the proper status of this rat 

 should be a subspecihc one, instead of considering it entitled to 

 specific rank as originally described. 



Perodipus panamintinus. 



Perodipus panamintinus Merr., Proc. Biol. Soc. Wash., 1894, 

 p. 114. 



18 Specimens: 12 Wild Rose Spring, Panamint Mountains, 

 3 Coso Mountains, 3 Lone Pine. 



In color this form so nearly resembles P. streatori that it is 

 difficult to distinguish them apart, but it has a shorter tail in 

 the adult, and somewhat smaller measurements generally. 

 "The stonv mesas and creek washes on Telescope Peak in the 

 Panamint Range were covered with the burrows of this rat. 

 Their vertical range extended from 4,000 to 6,500 feet, which in 

 this region coincided with that of Coleogyne, which forms a 

 nearly pure growth at this altitude. The burrows were very 

 numerous, a single rot usually living in a nest having a dozen 

 or more tunnels, the mouths of which are connected on the 

 surface by well-defined runways. In Coso Valley this form was 

 again met in the Artemesia and Coleogyne vegetation. About 

 Lone Pine it was fairly common at the base of the Sierras in 

 Artemesia brush and in gram-fields. Much to my surprise the 

 species was not found on the Inyo Range on the opposite side of 

 the valley, both slopes of which were explored." 



Sir,. Fam. Hkteromvix.k. 

 PEROGNATHUS. 



Perognathus panamintinus. 



Perognathus longimembris panamintinus Merr., Proc. Acad. 

 Nat. Scien. Phil., 1894, p. 265. 



Perognathus panamintinus Elliot, Syn. X. Am. Mamm., 1901, 

 P- -45- 



