174 CHIROPTERA 



MYOTIS NATTERERI Kuhl. 



1818. Vespertilio nattereri Kuhl, Ann. Wetterau. Gesellsch. Naturk., it 



(= Neue Ann., i), pt. 1, p. 33. 

 1857. Vespertilio nattereri Blasius, Saugethiere Deutschlands, p. 88. 

 1863. [Isotus nattereri] var. typus Koch, Jahrb. des Vereins fiir Natur- 



kunde im Herzogthum Nassau, xviii, p. 430 (Wiesbaden, Nassau , 



Germany). 

 1863. [Isotus nattereri] var. spelseus Koch, Jahrb. des Vereins fur Natur- 



kunde im Herzogthum Nassau, xviii, p. 430 (Erdbach, Nassau, 



Germany). 

 1878. Vespertilio nattereri Dobson, Cat'al. Chiropt. Brit. Mus., p. 88. 

 1900. Myotis nattereri MShely, Monogr. Chiropt. Hungariae, p. 179. 

 1904. Myotis escalerai Cabrera, Mem. Soo. Espafi. Hist. Nat., n, p. 279 



(Bellver, Lerida, Spain). 

 1910. Myotis nattereri and M. escalerai Trouessart, Paune Mamrc. d'Europe, 



pp. 29-30. 



Type locality. — Hanau, Hessen, Germany. 



Geographical distribution. — Central and southern Europe, 

 west to Ireland, north to southern Sweden. 



Diagnosis. — Size medium among the European species (forearm 

 about 38 mm., longest finger about 70 mm., condylobasal length 

 of skull, 14" to 14 - 6 mm.); ear elongated, extending about 

 5 mm. beyond tip of muzzle when laid forward, the conch narrow 

 (about 10 mm.), obscurely emarginate on upper half of posterior 

 border, the tragus relatively longer than in any other European 

 species, its height distinctly more than half that of conch ; foot 

 about half as long as tibia ; wing membrane extending to base of 

 outer toe ; edge of interfemoral membrane fringed. 



External characters. — General form essentially as in Myotis 

 mystacinus, but differing in the following particulars : ear much 

 longer and relatively narrower, extending conspicuously beyond 

 nostril when laid forward, its extremity more broadly rounded 

 off (owing to more uniform convexity of anterior border), and 

 concavity on posterior border even less evident ; antitragus 

 about as large as in M. mystacinus but less well defined ; tragus 

 relatively longer and more attenuate than in any other European 

 bat, its height conspicuously more than half that of conch, its 

 greatest width contained about 3£ times in length of anterior 

 border, its terminal third almost linear, sometimes faintly 

 recurved, the basal lobe usually small and ill defined ; insertion 

 of wing membrane as in M. mystacinus, but membrane at first 

 very narrow, so that in some specimens, particularly those that 

 have been hardened in strong alcohol, the point of insertion 

 appears to be on side of metatarsus ; * tail rather shorter than 

 head and body, only the cartilaginous extreme tip free ; calcar 

 better defined than in M. mystacinus, about as long as the 

 distinctly fringed free border of interfemoral membrane. 



* Such specimens seem to have formed the basis of the Myotis escalerai 

 of Cabrera. 



