120 



MONOORAPnS OF NORTH AMERICAN RODENTIA. 





Mili' 



I :■• 



tlio RcUhmlon megalotis is tlie same ns O. humills. The colors are confess- 

 ciUy the same. Tlic hciglit of the car (0.43) tliat is dwelt upon is no greater 

 tlian occurs in typical humilis (see table). The size (3.00) of one of the two 

 type-specimens is greater than we have ever determined for humilis by four- 

 tcntlis of an inch, but tiic other type (2.42 long) is well within the ordinary 

 range of humilis. It is interesting to observe that these two animals (Nos. 

 1039, 1040, fiO>n Sonora, Dr. Kennerly) do not approximate toward either 

 O. longicauda nor to tlie still larger and longer-tailed O. mexicanus. 



T.vDLK XXXIII. — ileaiuremcnU of twenty-six upcdment of Ociietoix>n humiijs. 



* Thia la tho idcDtioal length of bmly wwribod to the smaller of the two ipeclmons of "megalotis". 

 t Thia is tho identical length of oar ascribed to the larger of the two specimens of *' mogalotia'** 



OCHETQDON LONGICAUDA, (Baird) Coues. 



JMthrodon longi'auda, Baiiih, M. N. A. 1857, 451 (California).— fToMKS, Proo, Zool. 800. 1861, 884 



(Gunteninlii). 

 OchelodoH longicaHiUi, Coues, Proc. Acad. Nat. Sci. Pblla. 1874, 18C. 



Diagnosis. — O. humili simili^, sed caudd longiore, truncum superante, et 

 pedibus paululum validioribus ; coloribus magis Jlavicanlibus. Long. tot. 2-2J, 

 caudcE 2J-3, pedis §. 



