256 PROCEEDINGS OF THE ACADEMY OF [March, 



eluding teeth [11] 5.9 (5.8-6); greatest length of mandible [10] 11.7 

 (11.3-12.3); breadth of brain-case above roots of zygomata [9] 7.8 

 (7.4-8). 



Remarks. — The slightly smaller general size and the character of 

 the first upper premolar will be found to separate this race from typical 

 davyi. The characters are, however, such that merely subspecific 

 rank should be accorded it. The range of variation in size in davyi 

 fulvus is ver}^ considerable, and does not appear to depend on sex or 

 locality. 



Specimens Examined. — Thirty-one, eleven skins, twenty alcoholic 

 individuals : 



Tehuantepec, Mexico. [U. S. N. M.] [6.] 

 Santa Efigenia, Tehuantepec, Mexico. [U. S. N. M.] [2.] 

 Apazote, Campeche, Mexico. [Biological Surv.] [1.] 

 San Andres Tuxtla, Vera Cruz, Mexico. [Biolog. Surv.] [11.] 

 Mirador, Vera Cruz, Mexico. [U. S. N. M.] [7.] 

 Acapulco, Guerrero, Mexico. [Biolog. Surv.] [2.] 

 • Hacienda Magdalena, Colima, Mexico. [Biolog. Surv.] [1.] 

 Plains of Cohma, Mexico. [A. M. N. H.] [1.] 



