154 REITHRODONTOMYS. NBOTOMA, 



Genl. Char. Similar to R. m. intermedius, but more fulvous, col- 

 ors stronger. 



Color. Above yellowish brown, mixed with blackish; indistinct 

 fulvous lateral line. Beneath grayish white; feet soiled white. Tail 

 long, bicolor, upper third brown, rest grayish white. 



Measurements. Total length, 156; tail vertebrae, 8g; hind foot, 

 19; ear, 12. 



Sub. Fam. III. Neotominae. 



50. Neotoma. 



I. l=i; M. t^^ = 16. 



C. H. Merriam. The Neotomina, with descriptions of a new genus 

 and species and a Synopsis of the known forms. Proc. Acad. 

 Nat. Scien. Phil., 1894, pp. 225-252. 



Neotoma. Say & Ord, Journ. Acad. Nat. Scien. Phil., 1825, p. 346. 

 Type, M. fioridana, Ord. 



Teonoma, Gray, List Spec. Mamm. Brit. Mus., 1843, p. 117. 



Skull long; zygomatic width equals half the length of skull; 

 edge of maxilla bounding anteorbital foramen, rounded; the foramen 

 broad and open above, compressed into a somewhat narrow slit 

 below; intermaxillaries reaching back to interorbital region; nasals 

 much shorter; palate terminating with a concave border posteriorly 

 between last two molars; audital bulla; small; their axis oblique to 

 that of the skull; occipital plane of skull perpendicular, at right 

 angles to the superior surface; process of jugal extends downward 

 and backward, that of squamosal joining it at almost a right angle. 

 Mandible with long, acute, coronoid process, higher than condyle. 

 Roots of lower incisor causing protuberances on either side of the 

 jaw; upper molar teeth with usually two external and one internal 

 reentrant loops; first and second lower molars with two external and 

 two internal loops, last molar with only one of each. Upper molars 

 three rooted; lower with but two roots. The two sections of the 

 genus are distinguished by those with round somewhat bare tails, and 

 those with densely haired, bushy tails; the latter having the rostrum 

 longer, and the interorbital constriction greater. 



A. Neotoma. 

 Tail long, bare, round. 



215. cumulator. {Neotoma), Mearns, Proc. U. S. Nat. Mus. Wash., 

 1898, p. 503. 

 Type locality. Fort Yuma, San Diego County, California. 



