1917.] 



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



445 



The two series are indistinguishable in every respect. Each series, however, 

 shows a considerable range of variation in color, some of it due to age but mainly 

 purely individual, the fawn color of the upper parts varying greatly in tone in differ- 

 ent specimens, independently of sex and age. 



There is apparently a slight sexual difference in size, the females having the fore- 

 arm averaging about 2 mm. longer than the males, and there is a corresponding but 

 slighter average difference in the length of the skull. 



Eptesicus faradjius appears to be related to E. flavescens (Seabra), but 

 it is smaller than the latter and should be readily distinguishable from it 

 by the deep fawn color of the upperparts (varying in different specimens 

 from light yellowish to olivaceous and even to slightly rufescent in different 

 specimens), combined with a forearm length of about 34 mm. as against 

 37 in flavescens. 1 It is very different in coloration from E. phasma, with a 

 large series of which it has been compared, and with which it closely agrees 

 in size. 



38. Eptesicus minutus minutus (Temminck). 



Vespertilio minuta Temminck, Mon. Mammal, II, 1835-41, p. 209. "Elle vit . . . . 

 dans plusieurs parties de la pointe meridionale de l'Afrique." 



Two specimens in alcohol, both adult males, appear referable to this 

 species: Niangara, 1, March 27, 1913; Isiro, 1, July 3, 1913. 



Forearm, Isiro specimen, 28.5; Niangara specimen, 28.2. Skull, 

 Isiro specimen, total length, 12; zygomatic breadth, 8.5; mastoid breadth, 

 7.3; upper toothrow (c-m 3 ), 4. The skull of the Niangara specimen is too 

 fragmentary for measurement. 



39. Eptesicus garambse sp. nov. 



Type (and only specimen), No. 49340, & ad. in alcohol, Garamba, March 14,. 

 1912; Herbert Lang and James P. Chapin. American Museum Congo Expedition. 

 Orig. No. 1888. 



Upperparts very dark brown, the hairs without appreciably lighter tips; under- 

 pays similar but slightly paler, the tips of the hairs faintly grayish; membranes 

 naked, blackish with a very narrow whitish edging; inner surface lighter and slightly 

 grayish; lower surface of limb bones whitish, in strong contrast with the dark mem- 

 branes; wing membranes from base of outer toe; last caudal vertebra free for half 

 its length; proximal vertebrae slightly hairy. 



1 The external measurements of 13 specimens of flavescens, as given by Seabra are: Total length, 

 117 (111-126), in 10 specimens of faradjius, 90 (83-96); head and body (flavescens), 85 (81-90), in. 

 faradjius, 52.6 (46-56); tail in flavescens, 33 (30-36), in faradjius 36 (35-43). Cf. Seabra, Jorn. Sc. 

 Math.-Phys. e Nat. Lisboa (2), VI, p. 125, Feb. 1900. 



