1922] 



Allen, Congo Sciuridx, Anomaluridas, Idivrida? 



47 



Darker southern form: Underparts medially strongly suffused with pale rufous, 

 usually without trace of a whitish pectoral area; throat, sides of head below 

 eyes, entire inner side of fore and hind limbs, and extreme posterior part of 

 abdomen intense dark rufous; outer edge of fore limb, lower forearm in front 

 and upper surface of fore and hind feet, wrists and ankles chestnut-rufous, 

 which also extends to the median basal underside of tail. 



H. r. rubricatus, new subspecies. 



Average External and Cranial Measurements of Heliosciurus 

 rufobrachium pasha, medjianus, and rubricatus 





External 



Cranial 







°}5 -si 



c 



1 and Body 



Vertebrae 



Foot 





a 



J 



02 

 C 



03 

 CD 



£ 



a 



1 







P'o 













a 



o 



























^ a 



o 





0J 





c3 





> 







2i 



h 



X 



H 



X 



W 



C3 



N 



H. r. -pasha, Niangara 



10 



473 



223 



251 



56.2 



18.3 



52.2 



30.6 



H. r. medji- Medje and 



12 



497 



239 



258 



58.2 



18.0 



52.9 



30.5 





anus, Nrapu 



6 



507 



239 



268 



58.3 



17.5 



53.4 



30.8 



H.i 



\ rubricatus, Avakubi 



6 



501 



234 



262 



59.3 



18.3 



53.4 



31.9 



The relation of these three forms is so obviously geographic, and 

 reflects so strikingly the effect of environment, it seems desirable to 

 recognize these facts nomenclaturally, as follows. 



Heliosciurus rufobrachium pasha (Schwann) 

 Sciurus rufobrachiatus pasha Schwann, 1904, Ann. Mag. Nat. Hist., (7) XIII, 



January, p. 72. T}-pe locality, Bellima, Mombuttu, Belgian Congo. 



Heliosciurus rufobrachiatus pasha Thomas, 1915, Ann. Mag. Nat. Hist., (8) 



XVI, December, p. 473, (part). The Irumu specimen. 



Represented by 12 specimens (7 males, 5 females), all adult, col- 

 lected as follows : 



Niangara, 10 (6 cf, 4 9 ), November 9-20, 1910. 



Faradje, 2 (d\ 9 ), December 2, 1911. 



The type locality of Sciurus rufobrachium pasha Schwann is given 

 as " Bellima, Mombuttu," the type being an adult male collected b}^ 

 Emin Pasha, July 13, 1883. Bellima does not now exist, Mr. Lang in- 

 forms me. It was long since abandoned by the natives. But its former 

 site was about 25 miles southeast of the present Niangara. Hence the 

 ten specimens in the Lang-Chapin Collection are practically topotypes, 

 from which the two from Faradje are indistinguishable. 



