1917.] Allen, Lang and Chapin, Bats from the Belgian Congo. 429 



Total length Head and Body Tail Foot Ear 



85 (80-89) 61 (57-64) 24 (22-27) 12 (11-13) 22.9 (22-24) 



Forearm, same specimens, 53 (50-54). Skull (6 specimens), total length, 23 

 (21.9-23.6); zygomatic breadth, 11.7 (11.3-12.2); breadth at base of canines (9 

 specimens), 5.9 (5.6-6.2); maxillar breadth (across front corner of m 3 ), 8.3 (7.8-8.6). 

 P 2 is present on both sides in 3 skulls, on one side in 2 skulls, and absent on both sides 

 in 4 skulls. 



The series is very uniform in coloration; an immature male differs from the 

 others in being lighter and grayer, and is somewhat smaller. 



This form appears to be a northern representative of the Rhinolophus 

 auger group, of which several forms have been described from the Zambesi 

 region and southward by K. Andersen. 1 



21. Rhinolophus axillaris sp. nov. 

 Plate LI, Fig. 2. 



Type, No. 49175, cf ad. (skin and skull), Aba, Uele district, Belgian Congo, 

 Dec. 17, 1911; Herbert Lang and James P. Chapin. American Museum Congo 

 Expedition. Orig. No. 1807. 



Apparently a member of the R. landeri group. Has two phases, a dark brown 

 and a rufous phase. 



Dark phase. — Type, above dark hair-brown with a faint rufescent tone in strong 

 light, the fur dull gray-brown basally, with long hair-brown tips (in some specimens 

 forming a dark broad V-shaped area on the lower back) ; below much lighter, the fur 

 pale brownish plumbeous basally, the tips darker, giving a pale brownish wash. At 

 the base of each arm is an axillar patch of short, stiff, dark rust-colored hairs, about 

 4 by 6.5 mm. in area, in strong contrast with the surrounding fur, both in color and 

 texture. Ears and feet pale brown, membranes darker. 



Total length (collectors' measurements), 77 mm.; head and body, 52; tail, 23; 

 foot, 11; ear, 18. 



Rufous phase. — -Above rich cinnamon-brown, the fur basally pale gray, with 

 long dark cinnamon-brown tips; below pale buffy white, with a grayish tone. 



The red phase is represented by a single specimen, in which the glandular axil- 

 lary area is pale yellow. The dark phase is represented by 4 specimens, in one of 

 which an axillar glandular area is not evident, and in a second is less strongly marked 

 than in the other two. All were taken at the same locality and practically on the 

 same date (three on Dec. 17, the other two respectively on Dec. 13 and 15). 



Collectors' measurements (3 males, 2 females) : Total length, 79 (75-84) ; head 

 and body, 54 (52-58); tail, 26 (23-29); foot, 11 (10-12); ear, 19 (18-22). 



The skull of the type is badly crushed. The measurable skulls give the following: 

 Total length, 3 skulls, 20 (all 20); zygomatic breadth, 2 skulls, 10.2 and 9.6; breadth 

 at base of canines, 4 skulls, 5.4 (5-5.5); breadth at m 3 , 6.9 (6.7-7.2). 



1 Five new Rhinolophi from Africa. Ann. and Mag. Nat. Hist. (7), XIV, pp. 378-388, Nov., 1904. 



