126 



MONOGfiAPriS OF NOPTII AMERICAN RODENTIA. 



the Reilhrodon megalptis is the same as O. humilis. The colore are confess- 

 edly the same. The height of the ear (0.43) that is dwelt upon is no greater 

 than 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- 

 tenths of an inch, hut the 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, from Sonora, Dr. Kennerli/) do not approximate toward either 

 O. longicauda nor to the still larger and longer-tailed O. mexicaitus. 



Table XXXIII. — Measurements of twenty-six specimens of Ochetodon humilis. 



* Thla is the identical length of body ascribed to the smaller of the two specimens of "niegalotis". 

 t This is the identical length of ear ascribed to the larger of the two specimens of " megalotia ". 



OCHETODON LONGICAUDA, (Baird) Cones. 



Iieithrodon longicauda, Baird, M. N. A. 1857, 451 (California).— ? Tomes, Proc. Zool. Soc. 18G1, 284 



(Guatemala). 

 Ochetodon longicauda, Coues, Proc. Acad. Nat. Sci. Phila. 1874, 18G. 



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

 pcdibus paululum validioribus ; coloribus ?nagis jlavicanlibus. Long. tot. 2—2^, 

 caudcB 2-J-3, pedis §. 



