1905.] OP THE GENUS RHINOLOPHUS. 83 



parallel-margined. It would evidently have l^een much more to 

 the point if Dobson had called these Bats Rh. horneensis, not 

 Rh. megapliyllus. But Rh. horneensis, again, was confused with 

 Rh. minor, which, however, not only is a distinct species, but 

 belongs to a different group of the genus. 



5. Rhixolophus celebexsis, sp, n. (Plate III. fig. 4 a, h.) 



Rhinolophus tnegaphyllus (non Gray), var. /3 (paitim), Dobson, 

 Cat. Ohir. Brit. Mus. (1878) p. Ill (Menado). 



Diagnosis. Supraorbital crests meeting at a point more or less 

 in front of the middle of the orbit. Xasal swellings narrow. 

 Nose-leaves as in Rh. nanus and Rh. horneensis. Small : forearm 

 43-44-7 mm. 



Details. In the foregoing species {Rh. simplex, inegaphyllus, 

 truncatus, nanus), all of which ai-e Austi'alian or Avistro- Malayan, 

 the supraorbital crests join the sagittal crest at a point more or 

 less behind the middle of the orbit. In Rh. celehensis, as in all 

 ibhe other species of the present group, which are all Oriental, 

 Palpearctic, or Ethiopian, the supraorbital ci-ests meet at a point 

 more or less in front of the middle of the orbit. This makes 

 a comparatively shorter postnasal depression, the supraorbital 

 qrests being the lateral borders of this depression. In this point 

 therefore Rh. celehensis agrees with the Western forms of the 

 group, differing from the Eastern. 



The mechanical reason for this modification is evidently the 

 following : a slight increase in the size of the temporal muscle 

 has pushed the sagittal crest more forwards ; this involves a 

 shortening of the supraorbital crests ; this again a reduction in 

 the length of the postnasal depression. 



The nasal swellings are narrow (4' 8 mm.), as in the closely 

 related Eastern forms {iianus, truncatus). In the more Western 

 Rh. horneensis they are, at least somewhat, and as a rule con- 

 sidei-ably, broader. Compare figs. 4 and 5 on PI. III. 



It is worth noticing that the cranial characters of this species 

 are, so to say, "in accordance with " its geographical habitat: 

 Celebes is, geographically, intermediate between the Austro- 

 Malayan and Indo- Malayan subregions, and in its more im- 

 portant cranial characters Rh. celehensis points partly westwards 

 (shortening of supraorbital crests), partly eastwards (narrow nasal 

 swellings). 



The nose-leaves, ears, wings, and the general size are as in 

 Rh. nanus and Rh. horneensis. 



Colour. (1) Makassar specimen (5 ad.; in alcohol; unfaded ; 

 teeth unworn). — General impression of upper side : brown ; the 

 true colour is a deep brown shade of "clrab"; base of hairs a 

 little lighter than drab ; under side drab with a tinge of " broccoli- 

 brown." 



(2) Menado specimens (two skins ; ad. ; teeth almost un- 

 worn). — Above uniform dull " mai's-brown," base of hairs but 



6* 



