138 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 40. 



Measurements of Pilhecus. 



PYGATHRIX RUBICUNDA RUBICUNDA (Muller). 



1838-39. Seranopithecus rubicundus Muller, Tijdschr. Natuur. Gesch. Physiol., 



vol. 5, p. 137. 

 1839-1844. Semnopithecus rubicundus, Muller and Schlegel, Verb. Nat. Gescb. 



Nederl. Bezitt, pp. 61 and 69, pi. 9, figs. 1, 2, 3, and 1; pi. 11, fig. 1. 



Type-locality, southeastern Borneo. 



Doctor Abbott secured three specimens of Pygathrix rubicunda 

 rubicunda from Balik Papan Bay and three from the Seratok River. 

 These six specimens are practically topotypes of the species, the 

 original specimens having been collected at Mount Sakumbang and 

 Tana Lawut. (The latter place does not appear on any of the avail- 

 able maps. Mount Sakumbang is shown on the map on page 57.) 

 They are of a generally darker red color than any of the other 

 Bornean specimens of this species in the National Museum, and the 

 hands and feet have a more distinct tendency to be suffused with 

 blackish. 



There seem to be three distinct forms of this species on Borneo, 

 P. rubicunda rubicunda from southeastern Borneo, P. rubicunda ignita 5 

 from the northern parts of the island, a new form described below as 

 P. rubicunda rubida from western Borneo, south of the Kapuas River. 

 A fourth subspecies, P. rubicunda carimatse, from Karimata Island is 

 evidently derived from the Bornean fauna. 



The differential characters of the four forms are set fourth in the 

 table below. 



(For measurements, see table, p. 141.) 



i Collector's measurements. 



2 Collector's measurements computed to kilograms. 



3 Type. 



1 Weathered skull. 



6 Dollman, Ann. Mag. Nat. Hist., ser. 8, vol. 4, p. 204, September, 1909. 



