234 MILLER 



Characters. — Like specimens of Hipposideros larvat2isixovi\ Trong, 

 Lower Siam, but smaller in size and duller in color. 



Color. — Back dark hair-brown, the hairs yellowish drab-gray 

 through basal two-thirds, the extreme tips wood-brown. On shoulders 

 and head the hair-brown disappears, giving place on the former to the 

 drab-gray and on the latter to the wood-brown. Entire underparts 

 rather light and dull wood-brown, the extreme bases of the hairs 

 tinged with slaty. Ears and membranes blackish. Immature speci- 

 mens are less yellowish than the adults, but are otherwise similar. 



Skull. — The skull of Hipposideros barbensis is throughout slightly 

 smaller than that of mainland specimens of H. larvatus. Its form 

 is peculiar in the shortness and relative breadth of the braincase ; but 

 in all structural details it closely agrees with that of the Siamese ani- 

 mal. Interpterygoid space shorter and relatively broader than in H. 

 larvatus. 



Teeth. — The teeth are slightly smaller than those of Hipposideros 

 larvatus., but in form they show no peculiarities. In one specimen 

 there is on the right mandible a minute premolar wedged between the 

 two normally present. 



Aleasurements. — For external measurements see table, page 240. 



Cranial measurements of type: greatest length 21 (23);^ basal 

 length 18.2 (20); basilar length 16.2 (17.8); zygomatic breadth 

 12.4 (13); least interorbital breadth 3 (3.4); mastoid breadth 10.6 

 (11) ; greatest length of braincase 12 (14) ; greatest breadth of brain- 

 case above roots of zygomata '$).6 (9.6) ; frontopalatal depth (at mid- 

 dle of molar series) 4 (4) ; depth of braincase 6.4 (6.4) ; maxillary 

 toothrow (exclusive of incisor) 8.2 (9) ; mandible 14.4 (15) ; mandi- 

 bular toothrow (exclusive of incisors) 9 (9.8) . 



Speci?nens cxaiuincd. — Five, all from the tj'^pe locality. 



Remarks. — By its dull color and small size this species is readily 

 separable from its mainland representative, though in all details of 

 structure and form the two animals are scarcely distinguished. 



.? RHINOLOPHUS ROUXII Temminck. 



1835. Rhinolophus roiixii Temmixck, Monographies de Mammalogie, 11 

 (Huitieme Monographie), p. 30 b. Type locality, Calcutta. 



1892. RhinolopJnis ajfinis rouxii Thomas, Ann. Mus. Civ. Stor. Nat. 

 Geneva, ser. 2, x, p. 923. 



A bat in formalin, collected on Pulo Siantan, Anambas Islands, 

 during September is apparently referable to the species recorded from 



' Measurements in parenthesis are those of an adult female Hipposideros 

 larvatus from Trong, Lower Siam. 



