204 LEONTOCEBUS 



median length of nasals, 5 ; breadth of braincas'e, 26 ; length of upper 

 molar series, 8 ; length of mandible, 28 ; length of lower molar series, 10. 



The type of Midas leucogenys Gray, is in the British Museum 

 Collection. It is a young animal about half grown, and in all its mark- 

 ings exactly corresponds with the adult (M.) devillii Geoff roy. There 

 seems to be no reason whatever to separate it from the present species. 

 The type of L. devillii in the Paris Museum, presents the coloration 

 described, but it has lost much fur from the under parts of the body, 

 and the reddish chestnut of that part is not so pronounced as is shown 

 in recent specimens. 



Bartlett, who met with this species in eastern Peru, says (1. c.) it 

 was plentiful on the Peruvian Amazons, and he obtained examples on 

 both the Huallaga and Ucayali rivers. There is but little difference 

 between the sexes, the male being rather larger and darker in color, 

 especially the long hair on nape and neck. It is an extremely delicate 

 animal and will not bear the least cold, and he could only keep them 

 alive for two or three weeks, as they seemed to suffer from cold, and 

 died. The Indian women make pets of them, and allow them to stay 

 amid the long hair on their heads, and thus protected they will live 

 for a long time. Becoming tame they come out and feed, and having 

 captured a spider or two, they scamper back to their refuge amid the 

 luxuriant hair of their owners, who are usually unwilling to part with 

 them. 



Leontocebus apiculatus (Thomas). 



Midas apiculatus Thos., Ann. Mag. Nat. Hist., 7th Ser., 1904, p. 

 189. 



Type locality. Banks of the Copataza River, Ecuador. Type in 

 British Museum. 



Genl. Char. Differs from L. devillii in having the mantle chest- 

 nut, not black. 



Color. Head, throat, hands and feet black ; lips white ; long hairs 

 on neck and between shoulders forming a mantle, chestnut ; back 

 black mottled with gray, tips of hairs having that color ; arms and legs, 

 and under parts reddish brown ; blackish brown on chest ; tail reddish 

 brown at base, rest black. Ex type British Museum. 



Measurements. Size similar to L. illigeri. Skull : occipito-nasal 

 length, 43 ; intertemporal width, 22 ; zygomatic width, 29 ; palatal 

 length, 13 ; breadth of braincase, 25 ; median length of nasals, 5 ; length 



