No. 416.] MAMMALS IN SAN MIGUEL ISLAND. 633 
Skull, type, adult 4, basal length, 34.4 ; occipito-nasal length, 
37.4; zygomatic width, 20.4; least interorbital width, 6.2; 
length of nasals, 17.6; width of nasals, 5; length of palate, 
18.8; upper tooth row, from front of canine to back of last 
molar, 15.2; length of single half of mandible, 27.8. 
Didelphis karkinophaga cauce Allen. 
Two specimens, 4 and 9, were taken May 8. These have 
been compared by Dr. J. A. Allen with extensive material 
from South and Central America ; and it is Dr. Allen's opinion 
that they are best referred to this form, though they do not 
represent it in its extremes. 
Lepus (Tapeti) incitatus! sp. nov. 
Type (and only specimen): No. 8441, old adult ?, Bangs 
Collection, Museum of Comparative Zoólogy. Collected April 
30, 1900. 
Characters: An island form of Lepus gabbi Allen.  Distin- 
guished by its larger size, paler, more reddish-brown coloring, 
and larger, heavier skull, with much heavier, more arched 
rostrum. 
Color: Upper parts tawny-ferruginous ; brightest on top of 
head, palest — shading to dull ochraceous — on sides ; middle 
of back and top of head varied by the admixture of black- 
tipped hairs; nuchal patch, arms, and outer surface of legs 
clear, bright, tawny-ferruginous ; superciliary stripe dull buffy- 
white ; outer surface of ear colored like back, with short, dusky 
tip and narrow, yellowish-white outer border, inside of ear very 
sparsely haired — the hairs colorless ; under parts soiled white, 
except underside of neck, which is Isabella-color, shading into 
dull, tawny-ferruginous on sides of neck. 
Skull: Compared with skulls of true Z. gabbi from Panama 
and Chiriqui, the skull of Z. incitatus is larger and heavier 
throughout ; rostrum much wider and heavier, and more 
rounded and arched; bony palate wider and longer; molar and 
incisor teeth heavier. 
1 Jncitatus ; swiftly running; rapid, quick. 
