110 Merriam New Kangaroo Rats. 



facial crescents heavier ; nose blacker. Cranial characters uni 

 que. 



Color. Upper parts clay-color, lined with dark-tipped hairs on head and 

 back, becoming pale ochraceous buff on flanks; thigh patches large ; facial 

 crescents broad and indistinctly continuous to end of nose which is broadly 

 blackish ; inner side of legs dusky ; dorsal and ventral tail stripes barely 

 meeting in front of white pencil, the white lateral stripes being almost con 

 tinuous to the white tip ; ventral dark stripe pale ; dorsal dark stripe pale 

 for proximal I, becoming blackish on crested part; white pencil rather 

 short, measuring about 23 mm. beyond the tips of the black hairs in the 

 two specimens at hand. 



Cranial characters. Skull small for the size of the animal; rather 

 highly arched on top as in D. phillipsi ; supraoccipital between mas- 

 toid bullce broader than in any other known species; interparietal 

 nearly as broad as long; ascending branches of premaxilke broad and 

 slightly expanded posteriorly ; nasals somewhat narrowed posteriorly; 

 top of skull broad but not broad enough to hide zygomatic arches, which 

 are far apart ; sides of frontals sloping strongly inward from point slightly 

 anterior to plane of fronto-parietal suture ; nasals decidely longer than 

 frontal breadth immediately behind lachrymals. Mandible small for size 

 of skull; angle large and pointed. Upper premolar an incompletely double 

 prism, its crown with a well developed aiitero-internal lobe. 



Dipodomys ornatus sp. nov. 



Type from BERRIOZABAL, ZACATECA*, MEXICO. No. 57,990 9 ad. U. S. 

 Nat. Mus. Department of Agricultural Collection. Collected December 

 29, 1893 by E. A. Goldman. (Original number 5,613.) 



Measurements (taken in flesh). Type: Total length 274 ; tail vertebrae 167 ; 

 hind foot 39. Ear from anterior base 15 (in dry skin). 



General characters. Similar to Dipodomys phillipsi in size and 

 pattern of markings but brighter and more golden in color; 

 dark markings more extensive and blacker, ears somewhat larger ; 

 hind foot shorter ; tail crested penicillate, its tip white. 



Color. Upper parts bright golden clay-color, darkest on head and 

 median back, brightest on sides ; thigh patches large; facial crescents large, 

 broad, and very black, meeting broadly over bridge of nose which Is solid 

 black for ^ the distance from nostrils to eye except a small white spot over 

 extreme end of nose ; narrow ring round eye, inner sides of hind legs, and 

 dorsal and ventral tail stripes black ; tip of tail pure white. The white side 

 stripes of the tail disappear near the junction of the distal and middle thirds, 

 the black stripes uniting in a broad belt anterior to the white pencil. The 

 face is mainly white between the eye and facial crescent, though the white 

 is somewhat obscured, particularly near the eye, by dark-tipped hairs. 



Cranial character's. Skull similar to that of J). pkillijuri in general size and 

 form, but proportions different. Mandible larger and heavier with much 

 longer and broader angular processes. The basal length and mastoip 



