122 M( /'/•/(( III — ^liiuriciiH TIo(k/ Rats. 



Color. — Upper ]);irts (lull fulvous becoiiiinfj almost dusky alontr tlie mid- 

 dle of the back ; under parts pale fulvous; fore and iiind feet white; tail 

 bicolor, blackish above, soiled whitish below. 



Crankd characters. — i>kull similar in t,''eneral to that of tenidcnuda, but 

 larger; nasals slightly longer (cutting plane of orbits) and rounded instead 

 of truncate behind ; jugal very short ; anterior spine of bcisisphenoid longer ; 

 distance across molar seiies postei'iorly greater than length of series on 

 crowns [in temilcawla less] ; incisive foramina falling considerably short of 

 plane of m ^ [in ^cnc/c/uda reacliing or nearly reaching this ])lane]. Con- 

 trasted with N. orizaha: tlie skull otLj'iil.rlccnkr is lighter, the nasals truncate 

 anteriorly [instead of projecting acutely], and the inolai's narrower. 



Dnilal cluiracters. — ]\1 ^ with 3 well developed salient angles and two ver- 

 tical slits on inner side as in icnnicavda and piucloruin; m - also as those 

 species. 



Neotoma orizabiE sp. nov. 



TiijK hom Mr. Oiuzaba, Pliebla, RIexico. No. 53,653 rf ad. U. S. Nat. 

 Maseuni, Dejiartinent of Agriculture Collection. Collected April 20, 1893, 

 by Vj. W. Nelson (Original number 4074). 



Measurenu'nU (taken in tiesh). — Tyiic: Total length 356 ; tail vertebra' 

 163 ; hind foot 33. Ear from anterior base 38 (in dry skin). 



General characters. — Similar to Ncotoiiai fiilrirenfcr but upper 

 parts more buffy ochraceous instead of fulvous; belly white in- 

 stead of dull fulvous; hind feet shorter; pelage coarser; skull 

 and teeth different. 



Color. — Upper parts bright ochraceous buff, brightest and purest on the 

 the sides, obscured on the back by black hairs, and becoming grayish on 

 the head ; under ])arts and feet white, the chin and sides of the belly clouded 

 by the plumbeous under fur which shows through ; a salmon spot on each 

 side of the breast ; tail sharply bicolor, dasky above, whitish below. 



Crankd characters. — Skull similar to A', fidvimnler in general form and 

 tooth characters but heavier ; frontal narrower interorbitally with edges 

 more upturned; postjialatal notch broader ; nasals projecting much further 

 anteriorly and narrowly I'ounded ofl' in front [instead of truncate anteriorly]. 

 The ascending branches of the premaxilhe extend only a short distance be- 

 yond the nasals. 



Dint(d characters. — The molars are broader and heavier than in fidvirenter 

 and have larger dentine islands. M i has 3 salient angles and 2 vertical 

 slits on the inner side. 



General reiiiarls. — Specimens of this general type, differing 

 more or less in minor particulars, have been examined from Chal- 

 chicomula, Puebla, Mt. Malinche, Tlaxcala, and Oof re de Perote, 

 Vera Oruz. 



Neotoma mexicana bullata subsp. nov. 

 I'l/pe from Santa Catalina ]Mts,, Arizona. No. 16,863 (j^ ad. U. S. Nat 



