C ALLICEBU S 253 



THE REED TITI MONKEY. 



Type locality. Forest of the Potomaio and Iga rivers, on the 

 borders of Peru. Type "n Munich Museum. 



Color. Hairs on forehead yellowish white at base, then black, 

 and tips grayish white ; back of neck yellowish ; upper parts of body 

 rufous, becoming blackish on rump ; cheeks and chin white with a 

 grayish subterminal black ring ; limbs brown, hairs tipped with grayish 

 white, and with a subterminal black ring ; under parts of body grayish 

 white ; hands and feet similar to limbs, but darker almost black, the 

 hairs tipped with gray ; tail brownish black, tip reddish, the hairs, 

 except those of the tip, being yellowish white at base, remainder black. 



Measurements. Total length, 865 ; tail, 465 ; foot, 90. Ex type 

 Munich Museum. There was no skull. 



The above description was taken from the specimen labelled as 

 Spix's type in the Munich Museum. As will be noticed it bears no 

 resemblance whatever to the figure on plate XIV of Spix's work, and is 

 generally quite different from his description, at the same time it is 

 not like any of the described species of the genus. In general appear- 

 ance it is a reddish brown animal with nearly all the hairs tipped with 

 grayish white, and most of them with a subterminal black ring. 



The tail appears black with a red tip. I have never seen a gray or 

 ashy Callicebus like Spix's figure, and doubt if one exists in any 

 collection. If the present example in the Munich Museum is really the 

 type of C. ciNERASCENS the general idea of its appearance will have 

 to be changed from Spix's figure of an ashy gray animal, to a reddish 

 brown one speckled with grayish white. If Spix's draughtsman 

 intended to represent the present type by the figure on plate XIV, he 

 made a grievous failure. The type specimen is unique. Spix's descrip- 

 tion is as follows : "Ce singe a presque le taille du Saimiri. Son occi- 

 put et le dos sont d'un gris rougisseant, I'avant front, les quatres pieds et 

 le dessous du corps d'un gris de souris, et la queue noiratre. La tete 

 est tres allongee, la face aigue, brunatre, nue sur les sourcils et sur le 

 nez, et du reste vetue de petits polls cendres, entremeles de quelques 

 polls roides noirs ; des polls plus longs, cendres, rayonnent autour 

 I'exterieur de la face presque jusqu'a la gorge ; les polls du corps ne 

 sont pas si longs comme chez les autres especes de ce genre. Les 

 oreilles sont un peu tronquees, nues en dedans, et tres pelues en dehors. 

 Les mains et les pattes porte la meme couleur que la reste des pieds; 

 les dents et les ongles ont presque la meme forme que ceux de la prece- 

 dente espece, (C. amictus). J'ai trouve ce singe dans les forets de la 

 riviere Potomaio ou Iga aux f rontieres du Perou." 



