1905.] OF THE GENUS RHINOLOPHUS. 85 



width at base, at middle, and at summit: 2, 1*8, and 1'7 mm. 

 Lancet almost cuneate, or the lateral margins but slightly concave, 

 never abruptly narrowed at the middle (as in Rh. rouxi) ; length 

 of lancet about 4"2 mm. Ears and wings quite as in Rh. celehensis. 

 Plagiopatagium inserted on tai'sus, or as much as 1*5 mm. above 

 the tarsal joint. 



Colour. There is an extreme dark phase and an extreme red 

 phase, connected by several intermediate stages. 



(1) Dark phase. — 5, Banguey Isl. (Brit. Mus.) ; two c? , Pulo 

 Sarutu (Un. St. JSTat. Mus.) ; all of them full-grotmi, but with 

 tinworn teeth ; distal epiphyses of metacarpals in two of them 

 ossified, in one not completely so ; in alcohol, unfaded. General 

 impression of upper side : brown. The true colour is a deep bi'own 

 shade of "drab"; base of hairs next to "broccoli-brown." 

 Under side between " wood-brown " and " broccoli-brown." The 

 individuals are not precisely, but almost, alike in tinge. 



(2) Intermediate stage, nearer to " dark phase." — c? ad., 5 ^^1., 

 Labuan (B.M.) ; S ad., N.W. Borneo (B.M.) ; teeth either quite 

 unworn, or almost unioorn ; distal epiphyses of metacarpals ossified ; 

 in alcohol, unfaded. Upper side " russet," base of hairs but 

 slightly lighter. Under side " wood-bi'own." 



(3) Intermediate stage, nearer to "red phase." — $ ad., Sirhassen 

 (U. N. S. M.) ; S ad., $ ad., Karimata (U. N. S. M.) ; teeth either 

 quite unioorn, or very slightly worn ; distal epiphyses of meta- 

 carpals ossified ; in alcohol, unfaded. Much like the foregoing, 

 but also the under side of the body " russet." 



(4) Extreme red phase. — S ad., Sirhassen (B.M.) ; teeth un- 

 worn, ; epiphyses ossified ; in alcohol, unfaded. Much like the 

 extreme red phase of Rh. rouxi : not far from " cadmium orange " 

 above ; " orange " beneath. 



As proved by the above, these differences in colour are inde- 

 pendent of the geographical habitat and of the sex of the 

 individuals, seemingly also of the age. So far as the present 

 material goes, the only "phase" in which a quite young, though 

 full-grown, individual occurs (epiphyses not quite ossified) is the 

 dark phase ; but it may be accidental : the individual which 

 represents the extreme red phase is, at all events, only a few 

 months older (teeth unwoi-n). 



Skull. As in Rh. cdebeusis, but with broader nasal swellings 

 (5*4 mm., on an average). 



Dentition, pg almost always completely external, but in one 

 skull (out of eleven) half in row. Cingula of p^ and p^ in contact 

 (six), or very slightly separated (four), or distinctly separated 

 (one), p'~ always in the tooth-row ; cusp very small. In four 

 individuals there is an extremely narrow interspace between p'^ 

 and p* (the former place of p^). 



Distribution. Is. Borneo ; S. iSTatunas ; Karimata Group. 



Technical name. The type of Rh. borneensis, in the Berlin 

 Museum, is from Labuan. There are two specimens from the 



