SCIURUS ABERTI. 95 



Nos. 2, 3, 4, 5 and 6 are colored like N^. 1. — 7. Adult, 

 North- America. Entirely black colored , nose and ears white. 

 Catesby's tiiger without white collar. — 8. Adult female, 

 No rth- America , 1821. Represents the grey variation , called 

 virginianus by Catesby. — 9. Adult male , North- America. 

 Colored like the typical cinereus L. — 10. Adult specimen, 

 North-America, Frank, 1880. Back and tail, sides of legs 

 and feet blackish grey, lowerparts yellowish white, head aud 

 neck black, nose and ears white. — 11. Nearly fullgrown 

 female , North- America , colored like the former , but less 

 dark, feet white. — 12. Adult male, North- America , died 

 in the Rotterdam Zoological garden, April 1867. The tips 

 of all the hairs are pure white, giving thus the animal a 

 beautiful white color. 



13. Skull of NO. 1. — 14. Skull of N^. 7. 



15. Adult specimen, Georgia. Colored like N°. 1. This in- 

 dividual has been described by Kuhl under the name Sciu- 

 rus anomalus (vide infra p. 111). 



Sciurus abet'ti. 



1852. Sciurus aherti Woodhouse. Pr. Ac. Nat. Sc. Phil. 



VI. p. 220. 

 1877. Sciurus aherti Allen. Mon. N.-Am. Rodentia. p. 735. 



The short black side-stripe seems to be constant in this 

 species. As to the ear-tufts I call attention of naturalists ; 

 Allen remarks : » Of specimens obtained the same day at the 

 »same locality, some have well-developed ear- tufts, while 

 » others are wholly without them. The majority of the spe- 

 »cimens taken in summer show no trace of ear-tufts." 



The first upper premolar seems to be relatively larger 

 in this species than in either Sciurus fossor or Sciurus ca- 

 rolinensis (Allen. 1. c. p. 736). 



Hab. From the Mountains of Central Colorado southward 

 to the Apache Mountains of Arizona (Allen. 1. c. p. 736). 



Notes from the Leyden ]MTiseiim. Vol. "V, 



