No. 416.] MAMMALS IN SAN MIGUEL ISLAND. 635 
palatal notch), 9 ; length of incisive foramina, 17 ; width of 
incisive foramina, 6.4 ; upper tooth row, alveola, 14.6; length 
of single half of mandible, 56 ; lower tooth row, alveola, 15.4. 
Remarks. — The hare was not at all common in San Miguel 
Island, and Mr. Brown saw but one other during his stay. 
Mr. Brown tells me that Lepus gabbi and L. incitatus are ex- 
traordinarily swift of foot and. are seldom seen except for an 
instant as they dart like a flash through the undergrowth. 
The form found in San Miguel Island differs from true Lepus 
gabbi of the Isthmus in its larger size and heavier, slightly dif- 
ferent skull. The color is also slightly different, the island 
race being less marked along the back with black-tipped hairs, 
and the general coloring is decidedly redder. 
Dasyprocta callida! sp. nov. 
Six specimens, April and May. 
Type: No. 8443, adult 2, Bangs Collection, Museum of Com- 
parative Zoólogy. Collected May 8, 1900. 
Characters: A well-marked island species of the variegata- 
isthmica group. Color pale yellowish ; rump hairs black, with 
white tips. Skull very slender, with long, light rostrum and 
narrow nasals. Molar-form teeth small. 
From D. isthmica, the new species can be told by its white- 
tipped rump hairs (yellow-tipped in isthmica), and from D. co/om- 
biana (the form of this group inhabiting the Santa Marta 
region of Colombia), which also has white-tipped rump hairs, 
by much paler and more yellowish coloration. From either it 
is easily known by its very different skull (see figure on next 
page). 
. From the Central American D. punctata, D. callida and its 
allies differ chiefly in the character of the hairs of the rump. 
In D. punctata these are not so elongated and are annulated 
and colored like the hairs of the rest of the upper parts. 
Color: Hairs of upper parts annulated with yellowish and 
black, giving a slightly variegated look, though the yellowish 
much predominates, and the general color is yellowish clay- 
color, brighter, more ochraceous in middle of back anterior to 
! Callidus : that is, taught wisdom by experience; shrewd, cunning. 
