196 Bulletin American Museum of Natural History. [Vol. XII, 

 Lepus (Sylvilagus) superciliaris, sp. nov. 



Type, No. 15428, $ ad., Bonda, Santa Marta District, Colombia, July 4, 

 1899 ; Coll. H. H. Smith. 



Color above pale buff, strongly varied with black, which in some specimens 

 is quite the predominant color of the dorsal area ; sides rather paler with much 

 less black ; nape patch rich rufous ; frontal region, from the nose to a point 

 opposite the posterior canthus of the eyes, deep rusty chestnut, with, or wholly 

 without (in different specimens), a slight admixture of black-tipped hairs ; 

 crown paler rufous varied wifh black ; sides of the nose and cheeks buffy white, 

 more strongly colored and varied with blackish on the latter ; a broad very dis- 

 tinct grayish-white ocular stripe, very narrow below the eye, broader and 

 clearer above the eye, and forming a broad whitish patch both in front of and 

 behind the eye ; an indistinct blackish area midway between the eye and base 

 of the ear ; eyelashes black, the upper very long, thick, and intense black ; 

 above the ocular stripe is a very distinct narrow black stripe, separating the 

 broad gray ocular stripe from the rufous of the frontal region ; ventral surface 

 including inside of limbs, pure white to the base of the fur ; broad chest band 

 strong buff, the fur pale gray at the extreme base ; whole throat and chin white, 

 like the abdomen, but the pelage shorter ; fore limbs anteriorly pale rufous, 

 passing into white or buffy white on the feet ; hind limbs clear rufous postero- 

 externally, passing into buff on the antero-internal border ; top of hind feet 

 white, sides buff mixed with white, especially on the inner edge, more deeply 

 buff or pale rufous on outer edge ; soles dingy buff, the fur more grayish 

 basally ; tail pure white below, above dull rufous, the hairs blackish below the 

 surface, thus often giving a dingy rufous general effect ; ears large, thinly 

 haired, whitish gray at extreme base posteriorly, passing gradually to blackish 

 on the apical third, with a narrow edging of pure white ; the antero-exterior 

 third is more heavily clothed and grayish buff, the buffy tint strongest at the 

 base of the ear and passing gradually into blackish apically. 



Young in first pelage resemble the adults in all details of markings and color, 

 except that the dorsal area is more strongly varied with black, with a tendency 

 to a median blackish area, shown also in some of the adults. 



Measurements. Type, total length, 400 mm. ; tail vertebrae, 25 ; hind foot, 

 75, with claws, 87 ; ear (in dry skin), from notch, 55, from top of head, 72. 

 Five adults measure as follows : total length, 394 (375-410) ; tail vertebrae, 31 

 (25-33) ; hind foot (with claws), 93 (87-100) ; ear (in dry skin) from notch, 53, 

 from top of head, 65. 



Skull, total length, 79 ; basal length, 59 ; greatest (zygomatic) width, 35.5 ; 

 mastoid width, 26 ; interorbital width, 1 8 ; intertemporal width, 24 ; length of 

 nasals, 33 ; width of nasals at base, i6 : ; -palatal floor, 7.5 ; from henselion to 

 posterior border of palatines, 28.5 ; palatine foramina, 20x5.5 ; upper tooths 

 row, crown surface, 12, at alveolar border, 14 ; lower jaw, condyle to incisor 

 tips, 59 ; height at condyle, 32. 



This species is based on n specimens, 5 adult and 6 young, 

 the latter of various ages, but mostly less than one fourth grown, 



