32 < hi new Species of Sy\v'i]a.gu>i from Culomhia. 



Dimensions of the type (measured on skin) : — 



]Iinil toot 78 mm. ; car 42. 



.Skull: ti|) of nasals to liimler edf^c of inter[>arietnl (j8 ; 

 zyfjjomatic liroadtli 30; nasals (oblique) 28; interorhital 

 brcaijtli I?"-!; front of incisors to back of m^ 3G ; palatal 

 foramina ll*xG"3; palatal biiii^e 8; upper clieik-tootli 

 series (alveoli) 13*8. 



JInh. Clioaclii, near Bogota. 



Ti/pe. Adult skin and skull. B.M. no. 19. 10. 15. 2. 

 Received in exchanoo from Frcre A|)ollinaris Maria. 



'J'liis cotton-tail is one of tlie very short-eared members of 

 the f;roup, but is obviously different from tiie species above 

 mentioned or any other that we have. Of those we do not 

 possess, Allen's Syh'ilagns salenhis is the only one nee. ling- 

 mention. But this is from the heigiits above the Cauea 

 Valley, and is therefore completely separated by the Magda- 

 K-na Valley from Choachi. The black tips to its dorsal hairs 

 are measured as 15 mm. in length, as compared with 7 mm. 

 in (tpo//iiiar/.'ij and tho nuchal jjatcli is said to be oidy a 

 little longer than the ears when laid back. On this account it 

 seems ])robable that sulentus 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 (he specimen now described, the ]3ritish 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 Frcre Ajjollinaris is represented 

 by three specimens, and is a member of tlie lunger-eared 

 group. It appears to be quite dift'erent from any described 

 ibrnt, and may be called 



Si/lvi^agus purgatus, sp. n. 



A very pale-coloured species of the longer-eared section. 



General a})pearance most like that of -6'. margarild , but 

 even paler. Fur short and coarse, longer hairs of back 

 lli-17 mm. in length ; underfur thin ami i)Oor, about 8 nun. 

 long. General colour of the same sort of mixture as in 

 inarijariicv^ but decidedly paler and greyer — ])aler and greyer, 

 in fact, than in any other Colombian cotton-tail; doisal hairs 

 vith about 7-8 mm. at the base dark, then 4 mm. pale buflV, 

 the black tij) about 5 mm. Under surlace not specially 

 white, the hairs mostly with pale slaty bases, and wa>;he(l, 

 except just along the middle line, with pale bully. Ciown 



