140 MR. K. ANDERSEN ON BATS [May 16, 



of hairs of the upjoer side and the whole of the under side " drab- 

 grey." 



(2) Aged individuals ; skins ; Cyprus, Malta, Balearic Islands, 

 Switzerland, Germany. Much browner. General colour above 

 brownish " drab," with some individual variation in the shade of 

 the colour: sometimes almost " wood-brown " (lightest extreme), 

 sometimes with a tinge of " Prout's brown" (darkest extreme) ; 

 horse-shoe patch indicated, or quite obliterated ; base of hairs 

 " ecru-drab " ; under side " eci-u-drab," sometimes with a tendency 

 towards '' drab-grey." 



Skull. As in Rh. midas. 



Dentition. As in minor and 'midas. In the series of skulls 

 examined (20 ; of all races) there is, of course, some variation in 

 the position of p^ ; the general rule is : Pg extei-nal, p^ and p^ 

 almost or quite in contact ; one extreme : Pg almost in row 

 (one skull), and p^ and p^, therefore, well separated ; the other 

 extreme : p,^ not only external, but hair-fine (four skulls ; teeth 

 unworn), or disappeared and the alveoli obliterated (two skulls ; 

 teeth unworn). 



Distrihiition. From Gilgit to Ireland ; from the Baltic to 

 Sennar. 



Geographical races. The sei-ies examined — 95 examples, from 

 almost the whole area occupied by the species — enables me to 

 recognise three races of Rh. hipposidjeriis. The first two of these 

 would probably be called distinct species by other zoologists. 



27 «. Rhinolophus hipposiberus minimus Hengl. 



Rhinolophus 7ni7mnics Heugiin, N. Act. Acad. Cses. Leop.-Car. 

 xxix. (1861) p. 6. 



Rhinolop)hus hipposiderus minimus Andersen, Ann, & Mag. Nat. 

 Hist. (7) xiv. (1904) p. 455. 



Diagnosis. Small: forearm 34"7-38 mm. 



Details. As lately pointed out by me elsewhere (I. s. c), 

 V. Heuglin's Rh. Tninimus, first described from Keren in Eiythrea 

 (type in the Stuttgai't Museum), is a well-marked geographical 

 race of Rh. hipposiderus, difi^ering from the Central European 

 form by its considerably smaller size. At the same time I 

 mentioned that the British Museum possesses an example from 

 Sennar indistinguishable from the type specimen of minimus. 

 A subsequent examination of the whole series of Rh. hip>posiderus 

 preserved in the British Museum has revealed the rather surprising- 

 fact that Rh. h. minimus is by no means confined to Keren and 

 Sennar, but generally distributed over the Mediterranean Stthregion. 



It diflfers from the Central European form in being in every resp)ect 

 smaller ; in some respects, as it seems, absolutely smaller, in others 

 at least on an average. I find the length of the forearm to be 

 the best means for a ready disciimination : in minimits, 

 34-7-38 mm. ; in the typical form, 39-41-7 mm. For other 

 details, cf. the measui-ements on p. 143. 



