RODENTIA—MURINAE—REITHRODON MONTANUS. 449 
its root to the eye, or a little less than the head and body. It is well covered with short hairs, 
concealing the annuli. 
The colors of this animal are quite similar to those of the common house mouse; the back 
being of almost precisely the same shade of brown, perhaps a little darker. The under parts are 
grayish white tinged with reddish, but the lead-colored bases of the hairs, usually quite distinctly 
visible, impart a plumbeous aspect. The cheeks generally are fulvous, and in many specimens 
there is a distinct band of the same on the lower part of the sides. The feet, region round the 
mouth, and chin, and under half of the tail are white, much more conspicuous in the alcoholic 
specimen than in the dried skin. 
Several specimens from St. Louis resemble this very closely, but are not in sufficiently good 
condition to be determined. 
The first published description of this species was by Audubon and Bachman in 1841, The 
Mus lecontii of the same authors appears to be very similar, except. that the fulvous stripe on 
the sides is less distinct. As there is no difference except what might naturally result from 
age, I have reduced this name to a synonym. 
List of specimens. 
* 
a 7 1 T 
5 Measurements. 
ae SS 
a\s eae 
5 6 3 Locality. When Whence and how Nature of é & ; S = = 3 
3 eS Sp collected. obtained. specimen. | 5. 3 8 3 z = = 3 
|) 2 |e Si eS |e Sener ese lees lias 
gies rege || i heen lle Sie [occ [eee he ete |e ae 
Cae Sere eect hat ar is 
atch (eee sean: | (Society Hill, S.Ges-+.0)| saeco vere -seve| Ms Aw Curtin S\sons.2--|Skinvs ore: |vaecacleaceoe|sccczel ase cs 
Miata eee [owes lhe oa rtee dO.. ea_ Nemoare sal la es aalee sare oe | Sc nomas Our cvaaes satanic lhodOcacevans|eaucualiewash lander he rcanls 
aia SOA | lee eee cased a, 2a. ors feet.) Auge; 1655s Ses cee, dOracccsicesse.|s-dOsast es eleeres, |sveses |i oeeee| cscs 
TELS | eocnoelledad eecriduad (ha easeusicatonn | hoon dnaoes 0ccd eons coock ssccnggcicosdss jock sScsaccd| doe <od bonanallaccded qnecdd hacosd eacase | sensas|scces 5 
Pee ete seals Uaracll dlelasipicimis 0 Osa lwiatvie clelo's\aeia.ai| ae dale itwle'a'a as ail voces ne = UOse'c vcicizs’sic.e o.cis|| jell Ossiviaaieisiel vsceirts (sw iaw el cmciemalenleciuapaiceaaldlaeesicell celts | steleleias 
2535 38 77 -88 | 2.42 | 2.95 30 | .60]...... 
2536 .40 80 -90 | 2.10 | 2.01 28 GO iearcrte 
2537 .33 66 -85 | 2.10 | 1.90 27 50 |cccee 
2538 35 | .70| .86| 2.13] 1.97] .28| .57 |...00 
Se wedtweleees | ANErty COUNLYs Gives av loses sevacesecel) MAJOF LGCOULE -. 5. cece) SKIM voccce|cccees|cceses|tvenus|ancssee|ccccse|ucerscleccoas oe 
Soa ae acai On cinid sine nla'a cineca: lic aeine/e auineie € aja} acteiainiee /Osnlnwasiciacsiaate's |'<o€@nurcvcecielaccewe |eccsesileces's cl waeuiel aaeseslivectec|seceweleoeeer 
nC eee hate cust Usraeundaisecess)lavecacas vaNiccel sans scerdOsciag occwiccecss|ocUOrvetsicces|sscicslIncevac!escec(aeectelessccelesocect tassel commen 
Pee GOUT GH | Sta liGWity MO;rsescsace |'rovadelry ccs nace} re Go MMPCIMANM cc esi] «oUO-cieccecc|nccrec|cesccisleseeceluceces|eccecs|cocecslocee 17 
ere ee nen oriacin onenie)| caanistenealseed (nen elarite OUas (clowns /ace weisi| ocOOss staniuiajs l(sciseie |aaupits||snenice| ecjanewllesiee a n{iansiunlienssstellaansia ° 
REITHRODON MONTANUS, Baird. 
Reithrodon montanus, Barrp, Pr. A. N. Sc. Phila. VII, April, 1855, 335. 
Sp. Cu.—Tail very little less than head and body, which barely exceed two inches. Hind foot.50. ars small, the 
membrane thickened, and with long coarse hairs. Above, brown and pale yellowish gray, much lighter than mouse color. 
Outside of ears and flanks, pale yellowish brown, without any rufous. Beneath, dull whitish. 
The single specimen of this species brought by Captain Beckwith appears quite adult, though 
of very diminutive size, that of a half grown mouse. The head is short and considerably 
arched, the muzzle hairy, except the septum and the inner edges of the nostrils, on which no 
57 L 
