the Loioer Atnazons. 2G9 



7. Aotus trivirgatus, Humb. 

 (J. 64; ?. 66,67. Manacapuni, Rio Solimoes. 



8. Hapale emilice, sp. n. 



(^ . 36 ; ? . 37. Maloca, Upper Curud River, Upper Rio 

 Iriri, R. Xingii *. 



Near H. melanurus, but with white muzzle and no ligU.fc 

 hip-stripe. General coloration somewhat as in melanurus, 

 tlie shoulders and fore-back silvery grey darkening to rather 

 browner grey on the rump. Hairs of under surface silvery 

 grey. Crown between ears black or blackish, the muzzle in 

 front of the black quite wliite ; cheeks white; chin white, 

 practically naked. Ears large, without tufts, their thin 

 scattered hairs brown. Arms grey, whiter on their inner 

 aspect, hands blackish brown. Legs grey on outer, wiiiter on 

 inner side, but botli aspects more or less suffused with buflfy. 

 Feet blackish. Tail black except for its basal inch, whicli 

 is brownish grey. 



" Eyes yellowish brown. Face pink. Ears black at their 

 edges."— £;. S. 



Dimensions of the type (measured in flesh) : — 



Head and body 199 mm.; tail 308; hind foot 61; 

 ear 29. 



Skull : greatest length 44 ; condylo-basal length 35 ; 

 zygomatic breadth 29 ; breadth across orbits 25*5 ; maxillary 

 tooth-row 11'5. 



IJab. as above. 



Ti/pe. Adult female. B.M. no. 20. 7. 14. 12. Original 

 number 37. Collected 10th November, 1914, by Friiulein 

 E. Siiethhige. 



Tliis little marmoset, to which Fraulein Snetlilage has 

 drawn my special attention, and which I am pleased to name 

 after her, is a member of the FI. argentatus group, but is 

 readily distinguishable by its white muzzle and the absence 

 of a light hip-stripe from H. melanurus, the only species it at 

 all resembles. Of the other species of the group, //. argen- 

 tatus is almost quite white, a) art from its black tail, and Ikis 

 no blackish on tiie head. H. chry soleitcos has hairy ears and 

 a pale yellowish tail. — //. melanoleucos, Ribeiro, the Para 

 co-type of which is now in the British Museum, is wholly 



* The Curua River is marked in Stieler as a tributary of the main 

 Amazon, with its outlet near Santarem ; but I prefer to accept Friiulein 

 Suethlage's statement that it is an alUueut of the Iriri. 



