70 THE BRITISH MAMMALS : THEIR GENERA AND SPECIES. 



14. murinus, MOUSE-COLOURED BAT. Earlet straight ; no long hairs 



on upper lip. 



15. mystacinus, WHISKERED BAT. Earlet straight ; long hairs on 



upper lip. 



In this genus the outer edge of the ear begins in a line with the 

 inner margin of the earlet ; the ears are generally as long as, or 

 longer, than the head, and are narrow and thin ; the earlet is straight 

 or curved outwards ; the muzzle is narrow and hairy in front of the 

 eyes, and has no glandular swellings. The first premolar is well 

 developed, instead of being small or absent, and there are on each 

 side of the upper jaw two incisors, one canine, three premolars, and 

 three molars, the first and second premolars being smaller than the 

 third. The nostrils are simple, and the nasal apertures crescentic 

 in shape. The wing-membrane starts from the base of the toes or 

 thereabouts. 



The Rough-legged Bat has short ears, which, in both margins, are 

 straight in the lower third and become convex towards the tip ; the 

 earlet has the inner margin concave and the outer margin convex. 

 The feet are long, and there is a large claw on the thumb. The face is 

 not very hairy. In colour this species is brown, the hairs above 

 having drab tips, those below having white tips. The head and 

 body measure nearly two inches and a half; the tail measures two 

 inches. The Rough-legged Bat ranges through temperate Asia into 

 Europe, and is said to occasionally visit the south of England, 

 though only one specimen has found its way into our records. 



Daubenton's Bat has ears long enough to reach the tip of its 

 nose, and they are concave in the upper third of their outer margins. 

 The earlet is half as long as the ears, the end being straight and not 

 curved outwards, and there is a rounded lobe just above the base. 

 The face is bare, with a few hairs in front of the ears. The colour 

 is brown above and whitish below, where the tips of the dark brown 

 hairs become longer and paler. In length its head and body do not 

 quite reach two inches, and the tail is a quarter-inch less. The 

 wing-spread is about nine inches. Though not a common species, 

 it is widely distributed over the three kingdoms, and thence ranges 

 into Asia as far as Tennasserim, being generally noticed over 

 water, skimming the surface in chase of the insects on which it feeds. 



The Reddish-Grey Bat has the ears longer than the head, and 

 they are semi-transparent, and marked with glandular papillas. The 

 earlet is long, curving outwards and sharply pointed. The fringe 

 of stiff hairs on the membrane between the legs is very noticeable. 

 The fur is long and thick, dark brown above, and whitish below, 

 tipped with reddish on the upper parts, and with white on the lower, 

 the white tinder-surface rendering the species easily recognisable 

 when in flight. The head and body measure an inch and three- 

 quarters ; the tail is about as long. The fore-arm measures an 

 inch and a half, and the wing-spread is eleven inches. This Bat 

 is known all over Europe north of the Alps and west of the Urals- 



