1922] Allen, Congo Sciuridse, Anomaluridse, Idiuridse 71 



Upperparts (in comparison with a para-topotype of /. macrotis) with the hairs 

 narrowly tipped with light drab (instead of "sepia"), forming a slight wash of this 

 tone, strongest on middle of back and sides of neck, darkened by the deep neutral 

 gray (instead of dark plumbeous) underfur, which color predominates over the lower 

 back and flanks; underparts superficially pale vinaceous buff (instead of yellowish 

 wood-brown), the basal fur dark gull-gray (instead of plumbeous) ; upper surface of 

 membranes thinly clothed with dusky brown hairs (less dark than in macrotis, as 

 are also the membranes themselves) ; ears, feet, and base of tail also much lighter than 

 in macrotis. 



Collectors' measurements of type: Total length, 209 mm.; head and body, 73; 

 tail vertebrae, 126; hind foot, 20 (20.5 in dry skin); ear, 18. 



Collectors' measurements of the type and 3 topotypes (1 male, 3 females) : Total 

 length, 206 (199-212); head and body, 80.5 (73-87); tail vertebrae, 123 (117-128); 

 hind foot, 20.5 (18-21); ear, 17.3 (17-18). 



Corresponding measurements of the type and topotype (2 males) of macrotis, 

 as given by the author (loc. cit): Total length, type 241, topotype, 228; head and 

 body, 108, 105; tail vertebrae, 133, 123; hind foot, 21, 22; ear, 16, 15.5. 



Skull (measurements of type, with measurements of type and topotype of 

 macrotis in parentheses): Greatest length, 25 (26, 27); zygomatic breadth, 14.9 

 (15, 16) ; length of frontals — 1 (96, 98) ; least width of frontals, 6.5 (7, 7) ; length of 

 nasals, — 1 (7, 7); greatest breadth of nasals, 3.1 (3.25, 3.3); upper toothrow, 3.5 

 (3.8, 4) ; greatest distance between molars at m 3 , 1.5 (2.2, 2) ; least distance between 

 molars at m 1 , 1 (1.2, 1.2); greatest length of mandible, 14.9 (15, 16); greatest depth 

 (at coronoid), 9.7 (10, 10.6); lower toothrow, 3.7 (4, 4). 



Skull (type and 3 topotypes): Greatest length, 25.0 (24.-25.6); zygomatic 

 breadth, 14.5 (14.2-14.9). 



Represented by 4 specimens (1 cf, 3 9), all from Panga and all collected the 

 same day, September 18, 1914. All are old adults, with the dentition fully mature 

 and the fronto-nasal sutures fully ankylosed and wholly indistinguishable. 



Idiurus panga is a member of the I. macrotis group and is so 

 different from the I. zenkefi group as to need no comparison with it. 

 It differs from macrotis in smaller general size, much less heavy skull and 

 correspondingly weaker dentition. Also in the much paler hair-tips 

 above, the decidedly pinkish tone of the underparts, and the lighter 

 color of ears, membranes and feet, and also of the basal underfur, both 

 above and below. The ears appear to be decidedly larger than in macrotis, 

 as indicated by the field measurements and by direct comparison with 

 the para-topotype loaned me for examination through the kindness of 

 the describer of the species. 



Pronto-nasal sutures fully ankylosed and indeterminable. 



