378 University of California Publications in Zoology [Vol. 10 



In each case the capture of a shrew was a wholly fortuitous 

 event. When special pains were taken in setting and baiting, 

 with shrews particularly in view, nothing resulted. All the 

 shrews were trapped in mouse traps baited with rolled oats. In 

 one case the victim was clipped over the rump backwards, show- 

 ing that it had been merely running over the trap. 



The specimen from Strawberry Valley was caught beneath 

 an overhanging mat of roots four inches from running water, the 

 whole place over-shadowed by alders. In Tahquitz Valley the 

 shrews were caught beneath willows and veratrum plants on and 

 around the meadows. 



As far as shown by our collecting, this species in this region 

 belongs to the riparian association of the Transition zone. 



Notiosorex crawfordi Baird 

 Desert Shrew 



A single specimen secured (no. 1928) near Dos Palmos 

 Spring. 3500 feet, May 31. This was caught in a mouse trap set 

 on the bare sandy ground of a broad mesa among yuccas and 

 cactus (see pi. 10, fig. 1). The trap was baited with rolled oats; 

 bill the fact that a grasshopper was found crushed in the trap 

 along with the shrew makes it likely that first the insect was 

 attracted by the oats, thus constituting itself a "live bait" which 

 in turn attracted the shrew. 



Other mammals found in the same line of traps the same 

 morning were Perodipus, Dipodomys, two species of Prroynatlnis, 

 ,i l'i romysius, a Xoitoma, and an antelope chipmunk — a most in- 

 congruous assemblage ! The shrew was not nearer than 150 yards 

 to the nearest portion of the watercourse. 



The specimen is a fully adult female in molt, the pelage 

 dorsally being patchy, plumbeous and dull brownish. The meas- 

 urements are: length 82 mm., tail vertebrae 28, hind foot 10. The 

 mammae were large, evidently functioning. 



Scapanus latimanus occultus Grinnell and Swarth 

 Southern California Mole 

 Signs of moles came to notice very generally over the San 

 -Jacinto and Santa Rosa mountains. Surface runwavs were seen 



