1908] Grinnell —Biota of the San Bernardino Mountains. 139 
No. Sex Total length Tail vertebree Hind foot 
1591 2 304 136 38 
1606 2 312 140 39 
2163 2 297 135 36 
Eutamias speciosus (Allen). San Bernardino Chipmunk. 
This chipmunk proved to be abundant in the upper Transition 
and lower Boreal zones. South of the Santa Ana we found it 
more or less abundant above the 7500-foot contour. Many were 
trapped or ‘‘auxed’’ around Dry lake, where the species occurred 
in the tamarack pine woods up at least to 9500 feet altitude; 
also at the heads of South Fork and Fish creek, and on the north 
side of San Bernardino peak. On the upper South Fork, June 
28, 1905, I heard the seolding of a chipmunk accompanied by 
the excited ealling and bill-snapping of a pair of wood pewees. 
I arrived on the scene in time to see the nest of the birds being 
robbed by a chipmunk; in fact the job was complete, only parts 
of the egg-shells being in evidence when I climbed up. The 
nest was ten feet from the ground and six feet out towards the 
end of a horizontal pine branch. From all I ean learn this nest- 
robbing propensity of the chipmunks is evidenced as often as the 
opportunity offers. 
On the north side of the Santa Ana, the species was exces- 
sively numerous about Bluff lake, 7500 feet altitude. As early 
as July 16 families of small young were abroad, and these at least 
doubled the population extant earlier in the season. It was less 
common around the margins of Bear lake and in Holcomb valley ; 
but on the north side of Sugarloaf down to 7800 feet altitude it 
was as well represented as at Bluff lake. (See pl. 17.) 
The species was a noisy one, having a variety of ‘‘chips,’’ and 
a sputtering series of notes given when alarmed, or when quar- 
reling. The latter seemed to be a favorite occupation when there 
was nothing else to do. This chipmunk was a great climber and 
usually took to tall timber in preference to hiding in logs or rock 
piles. An individual would rapidly ascend a yellow pine or fir 
on the opposite side from the intruder, now and then peeping 
around to see what was happening. It would often climb as high 
as thirty or forty feet, finally taking refuge on top of a branch, 
and sitting there motionless peer down over the edge. But if a 
