2 University of California Publications in Zoology. (Vou-5 
afforded an attractive feature. My interest therefore centered 
in this region, and I earried on investigations with the purpose 
of ascertaining the composition of its fauna, and the local dis- 
tribution of the component species. 
T was assisted during the season of 1905 by Mr. Joseph Dixon, 
and during 1906 and 1907, my wife and certain students from 
Throop Institute were with me at various times and rendered 
much assistance. 
The trend of the San Bernardino mountains is from east to 
west ; my work was done along a north and south transverse belt 
from the Pacifie base of the range up over the Santa Ana water- 
shed, through Bear valley and down on the desert side to Box § 
springs. 
I did not venture west into the Little Bear valley and Deep 
creek district at all. The accompanying profile and maps in- 
dicate the region worked, and show the localities referred to in 
the accounts comprising this report. (See pls. 1, 2.) 
The following is a brief outline of my itinerary: In 1905 we 
entered the region June 10, by the way of Mentone and the lower 
Santa Ana canon. After working up over the Clarke’s ranch 
road to Seven Oaks, we pushed on through to the valley of the 
upper Santa Ana to the mouth of Fish creek, where we main- 
tained a base camp until July 6. In the interim, San Gorgonio 
peak, Dry lake, and the cienaga at the head of the South Fork 
were visited. 
From July 6 to 14 the vicinity of Seven Oaks and Foresee 
creek were worked, and San Bernardino peak visited. We then 
moved up over the Clarke’s ranch road to Bluff lake, where we 
collected until July 27. From that date until August 3rd, we 
camped at Bear lake, then traveled east through Bear valley and 
around Baldwin lake to Doble, where we stayed until August 9th. 
From the 9th to the 14th the desert around Cushenbury and Box 
S springs was worked; August 14th to 17th we spent at Cactus 
Flat; then went to Doble and across Baldwin lake (then dry) to 
the north base of Sugarloaf. This loeality was worked until the 
24th, when we returned to Doble. On the 25th and 26th, we 
went past Saragossa springs into Holeomb valley. On August 
27th, having returned to Doble, we took final leave of that place 
