348 University of California Publications in Zoology L VoL - 10 



At Cabezon, the few animals captured were found in a belt 

 of mingling of Upper and Lower Sonoran forms. The zonal 

 position. Upper Sonoran. is indicated by these extremes. 



At all points where the species was found, the characteristic 

 stick houses were more or less in evidence. They were built 

 up to especially large size beneath scrubby golden oaks close 

 around the Garnet Queen Mine. At Vandeventer Flat very large 

 nests occupied positions high in the live oaks. 



The series of fifty-one specimens of this wood rat, as com- 

 pared with satisfactory material from the vicinity of San Diego, 

 shows distinctly paler coloration, sufficiently different in degree 

 to warrant the use of a separate name. 



Our four specimens from Cabezon, the only ones from the 

 desert slopes, are no paler than the Kenworthy and Garnet 

 Queen Mine series. Some examples from each locality show 

 nearly pure white feet and more distinctly bicolored tail than 

 in average macrotis. Since the name macrotis should be re- 

 stricted to the dark coast form, it appears necessary to use 

 the name mohavt nsis for the pale brown-footed wood rats of the 

 whole San Jacinto area, just as has been done with the speci- 

 mens from the San Bernardino Mountains (see Grinnell, 1908, 

 p. 147). This seems a better course than to include the San 

 Jacinto scries under the name macrotis, as done by Goldman 

 (1910. p. 94). 



Microtus calif ornicus calif ornicus (Peale) 

 California Meadow Mouse 



Found in small numbers in widely scattered localities, suit- 

 able ground for this rodent being limited in this region. Two 

 adults (nos. 2240. 2241 ) were trapped on grassy banks close 

 to Ilemet Lake. 4400 feet, August 7 and 10. Four adults (nos. 

 2199-2202) were taken in the veratrum patches in meadows in 

 Tahquitz Valley. 8000 feet. July 24, 28 and 29. An immature 

 (no. 1766) was secured at the meadow in Round Valley, 9000 

 feet, July 10. An adult (no. 2007), was taken at the edge 

 of the little stream at Garnet Queen Mine, June 27. At the 

 latter place faint runways were observable in the low vegetation 

 close to the stream. 



