416 Whitaker: The Hatry-Armed Bat. 
kindly supplied for reproduction here (see Plate XLI.). 
From each of these journeys the bat returned in the best of 
health, and, if anything, I think, with an increased appetite ! 
I decided to try to keep it through the winter in a natural 
temperature, in order to make a few observations on it during 
hybernation, and accordingly, on September 27th, I put it into 
a smaller cage some eighteen inches square inside, with 
perforated zinc panels in the top and two sides. In one 
corner of this, supported on a couple of nails, I placed a large 
piece of semi-decayed wood, behind which the bat always 
retired when sleeping. I placed a small thermometer in the 
cage so that I could readily note the temperature. By. this 
time the bat had become so accustomed to artificial conditions, 
and to mealworms as an article of diet, that if a liberal supply 
of these were thrown into the bottom of the cage it would 
manage to secure a fair proportion of them, usually about two- 
thirds. It was never anything like so expeditious in finding 
them as are some species of bats, notably the Long-eared, an 
individual of which species I have known to secure every one of 
thirty mealworms put into a large cage, and this on the very 
first evening of captivity. 
Unfortunately, it was quite impossible for me to examine 
my Leisler’s bat every evening, and as on most evenings when 
I did so it was simply sleeping peacefully, I contented myself 
with taking occasional notes, and the most interesting of these, 
extracted from my diary, are as follows. The temperature 
given in Fahrenheit degrees (as 58 F.) was the actual temper- 
ature iz the bat’s cage at dusk :— 
Sept. 27th (58 F.)—Bat awake and fed well. 
Sept. 28th (54 F))—Bat did not wake up. 
Sept. 29th (54 F.). ditto 
Oct. 1st (57 F.). Bat awake, and ate seventy mealworms. 
Oct. 2nd (60 F.). ditto 
Oct. 3rd (60 F.). Bat awake, and crawling about its cage almost before 
dusk. Had disposed of nearly 100 mealworms since dusk of the previous 
day, when I had thrown them into its cage. I gave ita further supply, 
which it ate ravenously. The same evening I noted an unusual number 
of Noctules flying about at dusk. 
Oct. 4th to 12th. “Temp. at dusk averaging about 54 F. Ido not think my 
bat was awake at all on any of these evenings. 
Oct. 12th (58 F.). Bat awoke at dusk and ate about 65 mealworms. I put 
a further supply of about 130 into its cage. 
Oct. 25th (54 F.). (Higher temperature than any evening since the 12th). 
I noticed a Noctule flying over Worsbro’ reservoir at 3-40 p.m. in full 
daylight, though the afternoon was a dull one. On getting home about 
4 o'clock I went straight to look at my Leisler’s bat, to see if the same 
circumstances which induced the Noctule to fly had aroused it, but I 
found it sleeping. About 5 o'clock it awoke, however, aud ate about 
50 mealworms. 
Naturalist, 
