SENIOCEBUS 181 



been secured. The first two of the valid species are described 

 for the first time. 



1820. Kuhl, Beitr'dge zur Zoologie und vergleichenden Anatomic 



Seven species are here given, one of which is described for the 

 first time as (Midas) chrysomelas. The other valid species 

 are (M.) ursulus = Cercopithecus ursulus ; (M.) labiatus ; 

 (M.) rosalia; both now included in the genus Leontocebus ; 

 and (M.) cedipus, now placed in the genus CEdipomidas. The 

 last valid species (M.) rufimanus = Cercopithecus rufi- 

 manus; and (M.) leoninus a doubtful species, no example 

 extant. 



1820. Desmarest, Mammalogie ou Description des Especes de Mam- 

 miferes. 



The list given by Kuhl is repeated in this work, all the species 

 placed in the genus Jacchus. 



1823. Spix, Simiarum et Vespertilionum Brasiliensium. 



Five species are enumerated in this work, four of which are 

 described for the first time under the genus Midas. They are 

 (M.) fuscicollis; (M.) nigricollis; (M.) mystax; and 

 (M.) bicolor. These are now all placed in the genus Leon- 

 tocebus, except bicolor, which is a species of Seniocebus. 

 The fifth species is (M.) cedipus = CEdipomidas cedipus. 



1826. Maximilian, Prinz von Wied-Neuwied, Beitr'dge zur Natur- 

 geschichte von Brasilien. 



Under the genus Hapale five species are enumerated only two of 

 which belong to Leontocebus; viz.: L. rosalia and L. chry- 

 somelas; the latter more fully described than in the previous 

 work above cited. The other species are (H.) jacchus; (H.) 

 leucocephalus ; and (H.) penicillatus ; all belonging to the 

 genus Callithrix. 



1829. Fischer, (7. B.) Synopsis Mammalium. 



In the second section of the genus Jacchus ten species are 

 enumerated of which seven are valid, viz.: (/.) midas; (/.) 

 ursulus; (/.) labiatus; (/.) chrysomelas; (7.) rosalia; 

 (7.) chrysopygus; and (7.) argentatus. The first two are 

 now included in the genus Cercopithecus, the rest in Leon- 

 tocebus; and (7.) cedipus = CEdipomidas cedipus. The 

 other is (7.) leoninus doubtful. No new species described. 



1840. R. P. Lesson, Species des Mammiferes Bimanes et Quadru- 

 manes. 

 The genus Cercopithecus is here represented by Midas, with 



