1917.] Allen, Lang and Chapin, Bats from the Belgian Congo. 



431 



of the Avakubi series, but the maximum of the former is 0.5 to 0.8 mm. 

 greater than the maximum of the latter. There is, however, no appreciable 

 difference in coloration, and the two localities are less than seventy miles 

 apart and in similar environment. 



The 3 specimens from Aba agree in size with the Medje specimens. A 

 single specimen from Leopoldville agrees in every way with the Avakubi 

 specimens, but the 3 from Aba, the 4 from Faradje, and the 3 from Poko 

 agree in size with the Medje series, but in some of the Faradje and Poko 

 specimens the pelage is intense orange rufous, both above and below (a little 

 lighter and more intense below than above). 



The pelage above in all the skins is brown basally with a lighter inter- 

 mediate zone and dark rufous tips; below, the base of the pelage is dark 

 brown with long intense reddish orange tips. 



All the specimens here referred to H. caffer centralis come from well 

 within the range assigned to centralis by K. Andersen in his elaborate 

 review of the H. caffer group, 1 and also conform satisfactorily to his defini- 

 tion of this form. It is possible, however, that the Leopoldville and Ava- 

 kubi specimens should be referred to Andersen's H. caffer angolensis, and 

 only the more northern examples from Medje, Poko, Faradje and Aba to 

 H. c. centralis. 



23. Hipposideros caffer niapu subsp. nov. 



Type, No. 49414 (alcoholic), d 1 ad., Niapu, Belgian Congo, Jan. 27, 1914; Her- 

 bert Lang and James P. Chapin. American Museum Congo Expedition. Orig. 

 No. 2322. 



Similar in general coloration to H. caffer centralis, but much larger; it has a dark 

 phase and a rufous phase, like the other forms of the caffer group. 



Type (in rufous phase), upperparts uniform chestnut-brown; underparts cinna- 

 mon-brown; ears and membranes dark brown. 



. In the dark phase the upperparts are hair-brown, below lighter, with the tips of 

 the hairs lighter than the basal fur. Most of the specimens are in the dark phase, 

 which is similar to the corresponding phase of H. caffer centralis and H. abce, but none 

 of the specimens in the rufous phase approach nearly to the intensity of coloration 

 seen in many examples of either of these forms. 



Measurements: Type, total length, 88; head and body, 58; tail, 30; tibia, 21.8; 

 foot (c. u.), 10.8; ear, 11.2 X 14.5. Forearm, 54.5. In the ten topotypes (including 

 type) the forearm averages 54.7 (53-56). 



Skull (type), total length, 20.3; condylobasal length, 17.8; zygomatic breadth, 

 10.6; mastoid breadth, 10.2; interorbital breadth, 2.9; maxillary breadth, 6.8;. 

 breadth at base of canines, 4.8; maxillary toothrow (c-m 3 ), 66; length of mandible. 



1 On Hipposiderus caffer, Sund., and its closest Allies; with some Notes on H. fuliginosus, Temm. 

 Ann. and Mag. Nat. Hist. (7), XVII, pp. 269-283, March, 1906. 



