Grabham : Yorkshire Bats. 71 
county. It has a greater expanse of wing than any of our 
British species, and I have taken specimens measuring over 
fourteen inches from tip to tip. Last summer, Mr. John Clayton 
hollow tree at Grimston Park. let most of them go, with 
the exception of three or four very young ones, which were 
only just beginning to show indications of fur. hey were 
dark leathery-looking objects, and reminded me of very young 
cormorants as much as anything. I have seen this bat dip 
into a pool of water in the twilight, either for the purpose of 
having a drink or for ablution. I put four adults into a loose 
box where I kept a large Tawny Owl, intending to examine 
them in the morning for parasites; but I found Syrnzwm aluco had 
pulled off and eaten the head of each, and thrust a headless body 
into each. of the four corners of the stall. Bell is most certainly 
wrong in stating that ‘this Bat is seldom seen abroad much later 
than July.’ I have frequently in mild seasons seen it on the wing 
in the evenings up to the end of the first week in October. 
Mr. W. Denison Roebuck remarks that Yorkshire seems to 
be the northern limit for this species; extremely few records 
exist for counties further north, while in Yorkshire it is not 
2. esperugo leisleri. CLeisler’s Bat or Hairy-armed 
Bat. The latter name given to it because of a broad band of 
Short hair extending along the inferior surface of the forearm. 
But the Noctule also has this feature quite as fully if not more 
developed. I have never taken this Bat myself or had it sent 
to me, but I am always on the look-out for it. Messrs. Clarke 
and Roebuck say that three were.obtained by the late F. Bond 
about fifty years ago from an old factory chimney at Hunslet, 
near Leeds. Leisler’s Bat is considerably smaller than the 
the size and arrangement of the teeth. Dobson epitates them 
thus :—‘In V. noctula the fur is uni-coloured above and beneath, 
Or the colour of the hair is slightly paler towards the bases ; 
while in V. deds/er¢ the terminal one-fourth of the hairs above is 
bright yellowish-brown, beneath //gh¢ brown, the basal three- 
fourths of the fur on both surfaces dark brown. The outer 
upper incisor also in V. /ezslerZ is equal to the inner incisor in 
cross section at its base, but in V. moctula it is double the size 
March 7899. . 
