PYGATHRIX S7 



first impression it mai<es upon the observer is that it is specifically 

 distinct from P. rubicunda ; but after examining a series of this red 

 monkey from northwest Borneo, some of them from Mt. Mulu, the 

 type locality of ignita, with numerous examples in the United States 

 National Museum from southeast Borneo, they were found to be 

 identical in color of coat and in character of skull. Of course there 

 was individual variation, but both the dark hue, characteristic of 

 typical RUBICUNDA and light red answering to typical ignittts were 

 present, and all the skulls had the light mandible and slender ascending 

 ramus seen in rubicunda, but not in the island form P. carimat^. 

 The variation observable among the specimens in the shades and tints 

 of red in their pelage was independent of age or locality. I have 

 therefore placed P. ignita as a synonym of the present species. 



Since I examined Dr. Abbott's material, in the United States 

 National Museum, of P. rubicunda, Dr. Lyon (1. c.) has described a 

 specimen from Batu Jurong, southwestern Borneo, as distinct under 

 the name of Pygathri.v rubicunda rubida. The specimen from this 

 part of the island should be compared with those from other parts 

 of Borneo, not with P. carimatce which is distinct. Between P. r. 

 rubida and P. r. ignita (locality of last named specimen not mentioned, 

 but supposedly Mt. Mulu), the only diflferences observable in the table 

 of comparisons on page 139, are "Fossa between pterygoids relatively 

 deep, and the outer edge of posterior zygomatic root as a rule not 

 separated from outer mastoid edge by a distinct space or groove, the 

 two edges soon confluent" in P. r. ignita; per contra, we have, "Fossa 

 between pterygoids relatively shallow, and outer edge of posterior 

 zygomatic root separated from outer mastoid edge by a more or less 

 well defined groove or distinct space" in P. r. rubida. The italics are 

 mine. It would seem that one of these characters in the case of P. r. 

 ignita is not ahvays present, and that the same one in P. r. rubida 

 varies among individual's. There is no difference mentioned in the 

 color of the examples. When examining the same material which 

 proved that P. r. ignita could not be separated from P. rubicunda both 

 being found on Mt. Mulu, as mentioned above, I was unable to dis- 

 cover any character important enough to base a separation of these 

 monkeys from various parts of Borneo, any one from another, and it 

 does not seem that those advanced by Dr. Lyon are of sufficient im- 

 portance to create even subspecific distinctness, and the name bestowed 

 by him is therefore placed among the synonyms of the present species. 



