BATS. 209 



1. YESPERUGO MUKINUS, L. Gra skymlig Fladermus. The 



Parti-coloured Bat. D. F. 



Length^ 2 in. 4 1. ; fore-arm, 1 in. 6 1. Colour, above 

 shiny grey; grey-black beneath; white on the under 

 sides; cheeks and forehead black. Tragus broadest 

 above, and obliquely . rounded. Commonest of all the 

 bats in the middle and south of Sweden, and found 

 as far north as Upland at least. 



Professor Bell gives the synonyme of V. Murinus, L. 

 to the British mouse-coloured bat, which is not known 

 in Scandinavia. 



There is still some confusion in the identification of our 

 European bats, and much of this would be obviated if all 

 our principal naturalists would agree to adopt and use one 

 or at the most two synonymes for each species. We have a 

 case in point in the bat now before us. Two great authori- 

 ties, Bell and Nilsson, dispute to which species Linneus' 

 synonyme of V. Murinus strictly belongs. I think Nilsson 

 is decidedly right in claiming it for this species, because 

 Linne would hardly have described a species in his " Fauna 

 Suecica" under that name, unless it had been known in 

 Scandinavia, and the British mouse-coloured bat is not. 

 In describing this V. Murinus, L., Nilsson uses all the 

 following synonymes : V. noctula, Ketz. (now here is 

 confusion again, for the great bat, quite another species, 

 is the V. noctula of some authors), V. pipistrellus, Retz. 

 and V. discolor, Natt. 



2. YESP. BOEEALIS, Nilss. Nor disk Fladermus. F. 



Length, 2 in. 2 1. ; tail, 1 in. 5 L, protrudes further 

 than in the last; wing, 11 Jin. broad. On the back, a 

 large yellow-brown or grey spot, encircled with 

 black; under parts grey-black. Tragus, smallest at 

 the tip. 



Eesembles the last very much, but differs in being 

 smaller, the nose longer and sharper, and the ears being 

 higher and more transparent. Tragus is smaller, and the 



hair is longer. 



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