Eastern Buenos Ayres, &c. 241 



2. HTyotis nigricans, Geoff. 



<?. 2051,2090,2103. 



2 S , 1 ? i Q spirit. 



" Caught in house at night."— C. IT. B. G. 



3. Felis geoffroyi, D'Orb. 

 c?. 2086, 2087, 2095 (juv.) ; ? . 2075. 



4. Canis azaraj, Wied. 

 $. 2069, 2072; ? . 2070, 2073.— All young. 



5. Conepatus gibsojii, sp. n. 



S . 2056 ; ? . 2057, 2058. 



Two young in spirit. 



Size about as in C. chinga and feuillei, therefore distinctly 

 larger than in C. suffbcaus and proteus. Fur coarse, as in 

 the other Argentine species, very different from the soft fur 

 of C. humbvldti. White lines distinct, well defined, about 

 half an inch broad anteriorly, and posteriorly broadening to 

 about an inch on the back ; separate from each other on the 

 crown ; continued backwards over the hips and passing boldly 

 on to the sides of the tail, on the lower side of which they 

 sometimes coalesce. In C. chinga they are united on the 

 crown and almost or quite die away in passing over the rump, 

 though they reappear on the sides of the base of the tail. 

 In C. feuillei also they are joined on the crown, but quite 

 dwindle away before reaching the tail. Tail black above for 

 its basal three inches, then with a large heavy tuft of hairs, 

 which are mostly wholly white, but among which, especially 

 at the tip, there are some that are white basally and black 

 terminally. Such two-coloured hairs are not present in the 

 most nearly allied species, but are characteristic of C. lium- 

 boldti and C suffocans. 



Dimensions of the type (measured in the flesh) : — 



Head and body 331 mm. ; tail 188 ; hind foot 54 ; ear 24. 



Skull : condylo-basal length 67 (that of a male 73'5) ; 

 zygomatic breadth 44; palatal length 28; front of canine to 

 back of m 1 20'6. 



Type. Old female. B.M. no. 9. 12. 1. 18. Original 

 number 2058. Collected 6th October, 1908. 



This skunk is readily distinguishable from C. proteus and 

 suffocans by its larger size, from C. chinga and feuillei by its 

 stripes not coalescing on the forehead and by their even 



