662 Bulletin American Museum of Natural History [Vol. LXVI 



savanna country I find no evidence that the praemaxillae increase dis- 

 proportionately in late life, and I conclude that in this aspect the Niapu 

 specimens are not perfectly typical of erikssoni. The one other likeness 

 of the savanna specimens to the type of erikssoni lies in the diameter of 

 the teeth which are noticeably larger than those of the forest specimens. 

 Thus longitudinal and transverse diameters of the next to the last molar 

 in the largest animal from the forest are 10.0 and 6.0 mm., respectively, 

 whereas corresponding measurements in a large savanna specimen are 

 12.5 and 9.0, exactly the measurements reported for erikssoni. This 

 skull is, however, much smaller than that of erikssoni (24 mm. 

 shorter). The series at hand offers faint suggestion that in senility 

 the diameter of the teeth decreases with the total number. If this is 

 true the small teeth of the two Niapu aard-varks (and Hirst's Cameron 

 race, leptodon) are not diagnostic of race but only of age. 



It is concluded then that the forest race of the northeastern Congo 

 may be referred to Lonnberg's erikssoni. From available descriptions I 

 was not able to refer the aard-varks from Faradje to any of the described 

 forms, though on geographical grounds it would seem possible that they 

 might resemble kordofanicus Rothschild. The meager note accompany- 

 ing the proposed name for that race states that, with certain exceptions 

 (which may be juvenile characters), the type is nearest aethiopicus, 

 from which the Faradje aard-varks differ in several respects. I have 

 therefore considered it necessary to propose a new name for the race from 

 Faradje, which has been given as Orycteropus erikssoni faradjius Hatt, 

 in a preliminary report. 1 



Orycteropus erikssoni erikssoni Lonnberg 



Figure 2a 

 Orycteropus erikssoni Lonnberg, 1906, Arkiv for Zoologi, Stockholm, Bd. Til, 

 No. 3, p. 1. 



Orycteropus e. erikssoni is a large aard-vark occurring in the forests of 

 the Congo. It is characterized by short hair, short ears, and large claws. 

 The skull is large, the anterior base of the zygoma narrow, and the 

 mandible slender. 



Represented by an old c? and an old 9 , skins with skeletons, col- 

 lected at Niapu, November 24 and December 3, 1913. 



The collector's measurements of these animals are : 



Total Length 

 o" 1980 



9 . 1930 



Tail Length 



Foot Length 



Ear Length 



760 



300 





710 



287 



124 



11932, Amer. Mus. Novitates, No. 535, p. 1. 



