256 FIELD COLUMBIAN MUSEUM ZoftLOCY, VOL. III. 



desert forms. In size it is nearest to the first named, and it may have 

 a darker pelage, but as all the five specimens procured are in process 

 of change it is difficult to say what the color of the perfect dress 

 exactly is. It is considerably larger than L, 1. rufipes, with a shorter 

 ear, and soles of the feet colored differently from those of the other 

 two forms. 



ORDER CARNIVORA. 



FAM. CANID^E. 

 VULPES. 



Vulpes *arsipus. Sp. nov. 



Type locality: Daggett, San Bernardino County, California. 



Genl. char.: Similar to V. macrotis, but paler and smaller, post- 

 orbital processes longer; pterygoid fossa narrower. 



Color: Top of head mixed pale gray and brownish fulvous, more 

 brownish and darker than the back ; upper parts of body pale grizzled 

 gray, paler on the sides, where the gray grades into buff; outer sides 

 of fore legs and thighs, and down outside of hind legs to the toes pale 

 fulvous; narrow pectoral collar pale fulvous; black patch on sides of 

 nose from eye, and one on either side of chin; brown post-ocular 

 stripe; under parts, inner side of thigh, and front of hind legs 

 whitish, tail above pale gray, tinged with buff/ beneath buffy, tip 

 brownish black; ears externally pale cinnamon and narrowly edged 

 with white. 



Measurements: Total length, 810; tail vertebrae, 310; hind foot, 

 128; ear from notch, 86. Skull: occipito-nasal length, 103; Hensel, 

 104; zygomatic width, 61 ; interorbital constriction, 20.5; across post- 

 orbital processes, 28; palatal length, 56; length of nasals, 39; length 

 of upper molar series, anterior edge of first premolar to posterior 

 edge of last molar, 44; length of mandible, 82.5; length of lower 

 molar series, 47.5. 



This fox is an inhabitant of the Mohave Desert, and Mr. Heller 

 secured a series at various localities from Daggett north to Wild Rose 

 Spring at the base of the Panamint Mountains. It is paler and smaller 

 than the other described forms, and does not seem to have the red- 

 dish summer pelage characteristic of V. macrotis and V. hebes (hebe?) 

 of Calgary, Alberta, the present form apparently retaining its pale 

 grayish pelage throughout the year. Daggett was the most southern 

 point in the Mohave Desert where this fox was seen by Mr. Heller. 



* dpffdtouff swift of foot. 



