= March 1899. 
. Grabham-: Vorkshire Bats. 7S 
I myself have only once taken this Bat, and that was at Flaxton 
on 9th August 1895. It is easily recognisable by its long ears 
and tragus, light-coloured under parts, and long spur. (‘The 
spur is a long, tendinous process from the heel of the foot, 
which runs along the margin of the interfemoral membrane, and 
Serves to stretch it. It, in fact, represents the os calcis. It will 
be found of very different length in different species, varying 
_from three to seven lines or more.’—Jenyns.) Between the end 
of the spur and the tip of the tail the membrane is crenate or 
puckered and set with numerous short hairs. This character at 
once distinguishes the species. It is very gregarious. My 
friend, Mr. James Backhouse, had over thirty sent to him last 
summer from Wales, old and young. Examples of both he very 
kindly gave me for my collection, and the young he described 
for the first time in ‘The Zoologist’ for December 1898. They 
are quite unlike the old in colour, being pure white beneath, and 
mouse-grey above, but in other characters exactly resemble 
adult specimens. In old and young the transverse lines on the 
interfemoral membrane are few compared to those found in the 
Same part in the Whiskered and Daubenton’s Bats. 
Mr. Roeback has had this Bat sent often, and has usually 
considered it as at least as common in Yorkshire as V. mysfa- 
cinus. He has had it a seen it from Thorp Arch, Bingley, 
Nidderdale, and oth 
5: Vespert ilio Linen Daubenton’s Bat. Is not 
recorded by the authors of ‘Yorkshire Vertebrates.’ I have 
had four sent to me during the past summer, taken in different 
parts of the county. The first was very kindly sent to me in 
June by Mr. George Parkin, of York Street, Wakefield; it had 
flown amongst a party of excursionists at Fountains Abbey, and 
had been secured by one of them. r. Parkin also forwarded 
to me two skins of this species, which had been taken some | 
years ago from a Woodpecker’s hole in Hawe Park Wood, 
on Walton. For the fourth specimen I am indebted to the kindness 
of Mr. James Carter, of Burton House, Masham. The Bat was - 
shot flying over a deep pool in the river Yore. It is essentially 
an aquatic species, if this term may be applied to a Bat, and 
out by Mr. W. E. DeWinton, the spur, vide supra, runs three 
Parts of the distance to the tail, and there is always a distinct notch 
at its end. Again, the feet are noticeably larger for the size of 
“i lh 
