130 



MONOGRAPHS OK NORTH AMERICAN RODENTIA. 



Table XXXV. — Measurements of eleven specimens of Ochetodon mkxicanus. 



7748 

 7749 

 7007' 

 7007 k 

 7007' 

 8390 

 8459 

 S460 

 7290 

 •486-2 

 8393 



Locality. 



GraDd Coteau, La . 



do 



Tehuacan, Mexico. 



do 



do 



Orizaba, Mexico . . . 

 Cordova, Mexico . . 

 do 



Mirador, Mexico . 



do 



do 



Collector. 



Saint Charles College 



do 



F. Sumichrast 



do 



do 



do 



do 



do 



C. Sartorins. 



do 



do 



' No. 4862 is a perfect albino, pore -white everywhere, and doabtless had pink eyes. 



1 0CHETODON MONTANUS. (sp. proband.) 



lieithrodon montanus, Baird, Proc. Acad. Nat. Sci. Phila. vii, 1855, 335; M. N. A. 1857, 449, pi. liv, fig. 

 No. 1306 (teeth), (Eocky Mountains, latitude 39°). 



Chars. — Very small: head, I of an inch; head and body, 2$; tail, 2; 

 hind foot, i; ear, h. "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." — (Baird, I. c.) 



The type and only known specimen of this species (No. tVoV, Mus. Smiths.), 

 now before us, is one of the very smallest North American Rodents we ever 

 saw, although, as Professor Baird says, it appears to be perfectly adult, from 

 the worn teeth and other signs. It is somewhat less than ordinary adult 

 humilis ; it has, however, the same relative proportions of parts as in that 

 species. In color, it is noticeably different from any other Ochetodon, being 

 of the very palest kind of mouse-color above, the sides and under parts yel- 

 lowish-gray, with barely a trace of the fulvous always noticeable in the other 

 species. This coloration is exactly what we should expect after immersion 

 in alcohol for some time, which we suspect to be the case, though we have no 

 authority for stating that the specimen has been skinned out of spirits. The 

 single specimen is too imperfect to permit of final characterization, or to 

 enable us to come to any positive conclusion ; but if the size and coloration it 

 presents are really permanent, we should judge it entitled to recognition as a 

 valid species. At present, however, we regard it with suspicion, and are 

 unwilling to indorse its validity. 



