no. 1809. MAMMALS FROM BORNEO AND VICINITY— LYON. 



139 



PYGATHRIX RUBICUNDA RUBIDA, new subspecies. 



Type.— Skin and skull of adult female, Cat. No. 153790, U.S.N.M., 

 collected at Batu Jurong, southwestern Borneo, June 17, 1908, by 

 Dr. W. L. Abbott. Original number, 5979. 



Diagnostic characters. — Closely related to Pygathrix rubicunda rubi- 

 cunda, differing in having a somewhat lighter color, no conspicuous 

 suffusion of blackish color on the hands and feet, less prominent outer 

 edge of the mastoid, and a distinct space between that edge and the 

 edge of the posterior root of the zygoma. 



Color. — Type: General color similar to Ridgway's hazel, but rather 

 brighter, the hairs generally darker at the ends and lighter at bases, 

 so that on the back where the hairs are longest, the general color is 

 dark hazel; a considerable number of blackish hairs on the dorsal 

 surface of the fingers and toes. 



SJcull and teeth. — The skull and teeth of Pygathrix rubicunda rubida 

 are in general as they are in P. r. rubicunda; the outer edge of the 

 mastoid, however, is more inconspicuous than it is in the typical form 

 and is usually separated from the outer edge of the posterior root of 

 the zygoma by a more or less well-defined groove or distinct space. 



Measurements. — See table, page 141. 



Specimens examined. — Twelve, from various localities in south- 

 western Borneo. (See table of measurements for exact localities.) 



PYGATHRIX RUBICUNDA CARIMAT^: Miller. 



1906. Presbytis carimatx Miller, Proc. U.S. Nat. Mus., vol. 31, p. 65, July 23,1906. 



In addition to the original series of seven specimens collected in 

 1904, two additional specimens were collected on Karimata Island at 

 Telok Edar by Dr. W. L. Abbott in 1908. 



(For external and cranial measurements see table, p. 141.) 



Diagnostic characters of the forms of Pygathrix rubicunda. 



P. rubicunda carimatx. 



Lighter colored, without 

 well-marked blackish 

 suffusion on hands and 

 feet. 



Post-glenoid process long 

 and heavy. 



Fossa between pterygoids 

 relatively shallow. 



Outer edge of mastoid 

 relatively less conspicu- 

 ous. 



Outer edge of posterior 

 zygomatic root as a rule 

 not separated from out- 

 er mastoid edge by a 

 distinct space or groove, 

 but the two edges soon 

 confluent. 



Angle of jaw and condyle 

 large and heavy. 



P. rubicunda rubida. 



Lighter colored, without 

 well-marked blackish 

 suffusion on hands 

 and feet. 



Post-glenoid process not 

 conspicuously devel- 

 oped. 



Fossa between ptery- 

 goids relatively shal- 

 low. 



Outer edge of mastoid 

 relatively less conspic- 

 uous. 



Outer edge of posterior 

 zygomatic root sepa- 

 rated from outer mas- 

 toid edge by a more or 

 less well-defined 

 groove or distinct 

 space. 



Angle of jaw and con- 

 dyle not so large and 

 heavy. 



P. rubicunda rubicunda. 



Darker colored, with 

 blackish suffusion on 

 hands and feet. 



Post-glenoid process not 

 conspicuously devel- 

 oped. 



Fossa between ptery- 

 goids intermediate in 

 character. 



Outer edge of mastoid 

 rather conspicuous. 



Outer edge of posterior 

 zygomatic root as a 

 rule not separated 

 from outer mastoid 

 edge by a distinct 

 space or groove, but 

 the two edges soon 

 confluent. 



Angle of jaw and con- 

 dyle not so large and 

 heavy. 



P. rubicunda ignita. 



Lighter colored, without 

 blackish suffusion on 

 hands and feet. 



Post-glenoid process not 

 conspicuously devel- 

 oped. 



Fossa between ptery- 

 goids relatively deep. 



Less conspicuous. 



Outer edge of posterior 

 zygomatic root as a 

 rule not separated from 

 outer mastoid edge by 

 a distinct space or 

 groove, but the two 

 edges soon confluent. 



Angle of jaw and condyle 

 not so large and heavy. 



