12 . 
No. 103 
105. 
SUMMARY OF THE ZOOLOGICAL COLLECTIONS. 
. Mimus montanus Camp 119, Williams’ river, N. M. 
. Culicivora plumbea? do. do. do. 
. Pipilo aberti Camp 120, do. do. 
. Mimus montanus .......... do. do. do. 
Psaltria plumbea do. do. do. 
Pipilo mesoleucus do. do. do. 
وا‎ nilons..... apr... eer ee do. do. do. 
. Chrysomitris psaltria do. do. do. 
. Charadrius vociferus do. do. do. 
Centurus uropygialis (n. 8.) ............-. do. do. do. 
. Peucea lincolnlii . do. do. do. 
. Pipilo aberti do. do. ۱ 
. Lepus callotis? Camp 97, Little Colorado river, N. M. 
do 
'l'his species was found in greater numbers at the above-mentioned locality than 
elsewhere on the route. The valley at this point was covered by tall and coarse 
grass which grew in bunches, varying in size from a foot in diameter at the base, to 
several feet or even yards; there being always between them a narrow and tortuous, 
but clean pathway. In this grass this hare was generally found ; rarely going to 
the hills ; and the roots and tender shoots seemed to afford it food. 
. Hystrix Canadensis Little Colorado river, N. M. 
Neotoma —— Little Colorado river, N. M. 
These animals were numerous in many places in the valley of this river. They 
lived in the sand in very tortuous holes, and extending for many yrds, though 
rarely more than fifteen inches below the surface. The entrance to their abode 
was generally in a pile of earth heaped around the base of a mezquite bush, 
(Algarobia,) upon the roots of which it seemed to feed. So far as we noticed, 
they were entirely nocturnal in their habits. On several occasions we attempted to 
dig them out with spades, but were always forced, after hours of labor, to relinquish 
the task without having accomplished our purpose. The specimen procured had, 
during the night, gotten into an empty bucket, from which it could not get out, 
- and was captured alive in the morning. The body measured about three and a half 
inches, and the tail the same ; the hair was coarser and darker than that of some 
others of the same genus noticed. 
No. 106 Arvicola Camp 94. 
(a) Arvicola ..... Camp 94, 
) Arvicola Camp 94. 
These three specimens were caught at New Year Spring. Here was a luxuriant 
growth of gramma grass, (Boutelerea,) both in the valley and on the hill-sides. ' On 
the jatter places were many loose fragments of volcanic rocks of various sizes scat- 
tered about, but not in such quantities as to materially interfere with the growth of 
the grass. In this locality the specimens were found. They built their nests under 
the stones, and constructed them of dry grass in a manner similar to those of the 
common meadow mouse, (Arvicola riparius,) and, like this animal, had also paths 
under the grass, diverging in every direction from its hole; and, indeed, its general 
appearance was very much like that animal, and seemed only to differ from it in 
size, the specimens being decidedly smaller. 
No. 107. Neotoma ?..... Camp 96. 
This animal was found in a country covered by a growth of the rough-barked 
cedar, (Juniperus pachydermata.) 'lhey seem to select a hollow tree with a hole 
near the root; then around it they pile vast heaps of dry twigs, and fragments of 
