7. CHALraOLOBTTS. 255 



7. Chalinolobus poensis. 



KeriTOiila poensis, Gray, Ann. 8f Mag. Nat. Hist. 1842, p. 258. 

 Vesperus (Hesperoptenus) kraussii, Peters, MB. Ahad. Berl. 1868, 



p. 038. 

 Chalinolobus poensis, Bobson, P. Z. S. 1876, p. 387. 



Smaller than Oh. variegatus, but with similarly shaped head and 

 ears ; tragus more curved inwards and the lobule at its base less 

 acute ; lobes of the lower lip much less developed. 



Thumbs and feet as in the preceding species, and similarly black 

 at the extremities, with black claws. Postcalcaneal lobule long and 

 narrow, slightly narrower near the ankle, so that the outline is tri- 

 angular, the apex of the triangle about the middle, and formed by 

 the extremity of a small cartilaginous prop. Tail contained within 

 the interfemoral membrane, the extreme tip alone projecting. 



Fur, above, dark at the base of the hairs, then duU white, the ter- 

 minal third reddish brown, the extreme tip greyish ; the surface of 

 the fur on the head and neck paler than on the back ; beneath 

 similar, but with greyish yellow extremities. 



Wing- and interfemoral membranes brown, not traversed by 

 strongly marked venations as in the two preceding species. Integu- 

 ment of the ears and face white. 



The fur of the body extends upon the wing-membrane as far as 

 a line drawn from the middle of the humerus to the middle of the 

 femur, and upon the interfemoral triangularly as far as the end of 

 the third caudal vertebra. Beneath, the wing-membrane is covered 

 as far as a line drawn from the elbow to the knee-joint, and a few 

 thinly-spread hairs are ranged in short parallel rows on the mem- 

 brane posterior to the elbow and forearm. 



Teeth similar to those of C. argentatus, but not so slender, and 

 the upper incisors are more inclined outwards ; the first lower pre- 

 molar is scarcely larger than one of the outer upper incisors. Skull 

 scarcely differing in shape from that of Ch. argentatus (Plate XIV. 

 figs. 6, 6 a). 



Length (of an adult 5 *), head and body I"*8, tail 1"*9, head 0"*55, 

 ear 0"-5, tragus 0"-2xO"-12, forearm 1"-C5, thumb 0"-25 ; third 

 finger — metacarp. l"-6, 1st ph. 0"-6, 2nd ph. 0"-95; fourth finger 

 — metacarp. l"-4, 1st ph. 0"-45, 2nd ph. 0"-45 ; fifth finger— 

 metacarp. l"-3, 1st ph. 0"-35, 2nd ph. 0"-35 ; tibia 0"-65, foot 0"-3. 



Hah. W. Africa (Yoruba, Guinea ; Fernando Po). 



Through the kindness of Dr. Krauss, Director of the Stuttgart 

 Museum, I have been enabled to compare the type of Vesperus 

 kraussii, Ptrs., with that of Eerivoula poensis, Gtslj ,= Clialinolohus 

 poensis, Dobsou, and find not the least appreciable difference except 

 in size and colour, the Fernando Po specimen being slightly smaller 

 and paler in the colour of the fur. The figures of the skull of this 



* The type of Vesperus kratissii, Ptrs. For measurements of the typo of Keri- 

 voula poensis, Gray (type of this species), see P. Z. S. 1875, p. 388. 



