﻿340 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



[Sylvilagiis] superciliaris, Thomas, Ann. Mag. Nat. Hist., ser. 8, vol. 11, p. 211, 



1913 (synonym of cumanicus). 

 Sylv[ilagus] cumanicus superciliaris, Hummelinck, Studies on the fauna of 



Curagao, Aruba, Bonaire and the Venezuelan Islands, vol. 1 (Utrecht), 



p. 66, 1940 (La Guajira); vol. 2 (The Hague), p. 103, 1940 (Card6n and Rfo 



Hacha, Guajira). 

 Sylvilagus boylei Allen, Bull. Amer. Mus. Nat. Hist., vol. 35, p. 84, 1916 (type 



locality. La Playa, northwest of Barranquilla, Colombia). 



Holotype. — Adult male, skin and skull, A.M.N.H. No. 15428; 

 collected July 4, 1899, by Herbert H. Smith. 



Type locality. — Bonda, near Santa Marta, Magdalena, Colombia. 



Distribution. — Northern Colombia, from the Comisaria de la Guajira 

 south into the departments of Magdalena, Atlantic©, Bolivar, and the 

 Santanders. (See also the general account of distribution, p. 328.) 



Characters. — Nuchal patch Ochraceous-Orange to Tawny; rostral 

 patch, from tip of nose to crown, Ochraceous-Buff to Ochraceous- 

 Tawny; back of crown between anterior bases of ears dominantly 

 buffy; cheek buffy to ochraceous; ventral surface of tail sharply de- 

 fined cottony white, sometimes with a buffy wash. Basisphenoid 

 narrow, distance across ventral posterior edges of occipital condylar 

 ridges greater than width of sphenooccipital synchondrosis; nasal and 

 palatal bridge shorter, ear slightly longer than in Venezuelan rufous- 

 naped cottontails. 



Coloration. — Subterminal bands of cover hairs Ochraceous-Buff to 

 white, tips dark brown or black; rump predominantly grayish, con- 

 trasting with back; sides of body buffy to ocliraceous with a light mix- 

 ture or mottling of brown or black and contrasting with the more 

 coarsely darkened back; ventral surface, except collar, white usually 

 with a lateral band of buff or ochraceous. Nuchal patch Ochraceous- 

 Orange to Tawny ; rostrum Ochraceous-Buff to Ochraceous-Tawny , the 

 posterior portion darker and more coarsely mixed with black. White 

 circumorbital band defined by black line above, black patch behind, 

 and beneath by black streaks or lines with, frequently, a well-defined 

 patch anteriorly. Side of muzzle buff; cheek below orbit buffy to 

 Tawny streaked or lined with black. Upper surface of forefoot white 

 washed or mottled with ochraceous to entirely ochraceous; hind foot 

 white above with or without a wash or mottling of ochraceous; outer 

 side of limb Ochi'aceous-Buff to Ochraceous-Orange becoming warmer, 

 to Tawny, on inner side. Upper side of taU coarsely mixed gray, buff 

 and Tawny. Under side cottony white, sometimes lightly washed 

 with buffy. 



Measurements. — Means and extremes of six topotypes: Ears, dry 

 from notch, 55.3 (52-57) ; condylobasal length, 67.7 (65.1-70.4); zygo- 

 matic breadth, 34.4 (33.2-35.8); length of nasals, 31.3 (30.6-31.8); 

 greatest combined width of nasals at premaxiUary sutures, 15.4 (14.9- 



