1907.] MONKEYS FROM THE AMAZONIAN REGION. 99 



Midas illigeri Pucheran. 



I have recently received, through the kindness of the wife of 

 the German Consul at Pard, Dr. Olshausen, an example of another 

 species of Amazonian Marmoset Monkey hitherto vmrepresented 

 in our collections. It had been obtained at a very early age from 

 an Indian woman at Iquitos, and kept as a pet until its mistress 

 was about to sail for Europe. It lived several months at the 

 Museum until about half -grown, and is now mounted. 



Dorsal aspect. — Principal colour a lovely dai-k brown-red 

 covering the nape of neck, shoulders, and outer side of arms and legs. 

 embracing with a small band tlie rump and base of the tail. The 

 back, however, properly speaking, forms an exception to this colour, 

 bearing a very long oval patch, distinctly outlined, of dirty black 

 in the centre and greyish borders, with the tendency to form 

 posterioi'ly dimly apparent light and dark transA^erse bands. Head, 

 hands, feet, and tail black. 



Ventral aspect. — Uniformly brownish-black from the throat 

 as far as the anus, embracing the inner side of arms and legs, 

 separated from the dorsal patch by a brownish-red margin. 



In the black face we again find the white circumbuccal zone. 

 But in this case it leaves the nostrils free and the white runs u.p 

 to the cheeks in a triangular form nearly as far as the outer 

 corner of the eye. 



By this feature the animal immediately proves to belong to 

 the group 6, subdivision a of the classification of Schlegel (' Singes,' 

 p. 262), that is to say to the Hapale devillei group. Among all the 

 figures I have at my disjwsal, my specimen corresponds best with 

 the animal rejDresented in plate 1 3 of the ' Proceedings of the 

 Zoological Society,' 1871, by Bartlett, with the designation of 

 Midas devillei S (considerably better than with the figure of 

 M. devillei^ fig. 3, plate 6, in the ' Atlas ' of Castelnau, which lacks 

 any trace of a distinctly coloured dorsal patch). As the animal 

 there represented is attributed by Schlegel (' Singes,' p. 263) and 

 by Forbes (' Handbook of Primates,' p. 145 seq.) to Hapcde 

 illigeri Pucheran (' Revue de Zoologie,' 1845, p. 336), and as the 

 description of this species given by these two authors coincides 

 satisfactorily with my Iquitos individual, I think I have to do 

 with a half-grown specimen of Midas illigeri Puch.,a Marmoset 

 Monkey stated to be fairly abundant in the Peruvian Amazons. 



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