a2 On new Species of Sylvilagus from Colombia. 
Dimensions of the type (measured on skin) :— 
Hind foot 78 mm.; ear 42. 
Skull: tip of nasals to hinder edge of interparietal 68 ; 
zygomatic breadth 36; nasals (oblique) 28; interorbital 
breadth 17:4; front of incisors to back of m* 36; palatal 
foramina 19x 6:3; palatal bridge 8; upper check-tooth 
series (alveoli) 13°8. 
Hab. Choachi, near Bogota. 
Type. Adult skin and skull. B.M. no. 19. 10. 15. 2. 
Received in exchange from Frére Apollinaris Maria. 
This cotton-tail is one of the very short-eared members of 
the group, but is obviously different from the species above 
mentioned or any other that we have. Of those we do not 
possess, Allen’s Sy/vilagus salentus is the only one needing 
mention. But this is from the heights above the -Cauca 
Valley, and is therefore completely separated by the Magda- 
lena Valley from Choachi. The black tips to its dorsal hairs 
are measured as 15 mm. in length, as compared with 7 mm. 
in apollinaris, and the nuchal patch is said to be only a 
little longer than the ears when laid back. On this account it 
seems probable that salentus is a member of the longer-eared 
group, though Dr. Allen gives neither measurement nor 
statement as to the actual length of the ears. 
Besides the specimen now described, the British Museum 
contains two examples received from Mr. Child about twenty 
yeais ago, but one had no skull, the other was young, so they 
have never been previously determined. 
The second species sent by Frere Apollinaris is represented 
by three specimens, and is a member of the longer-eared 
group. It appears to be quite different from any described 
form, and may be called 
Sylvilagus purgatus, sp. n. 
A very pale-coloured species of the longer-eared section. 
General appearance most like that of S. margarite, but 
even paler, Fur short and coarse, longer hairs of back 
16-17 mm. in length ; underfur thin and poor, about 8 mm. 
long. General colour of the same sort of mixture as in 
margartie, but decidedly paler and greyer—paler and greyer, 
in fact, than in any other Colombian cotton-tail; dorsal hairs 
with about 7-8 mm. at the base dark, then 4 mm. pale buffy, 
the black tip about 5 mm. Under surface not specially 
white, the hairs mostly with pale slaty bases, and washed, 
except just along the middle line, with pale buffy. Crown 
