THE MAMMALS OF SURREY. 179 
Natrerer’s Bat (M. nattereri). — One taken by myself in a 
bedroom at Milford in July, 1902. 
WHISKERED Bat (M. mystacinus).—On April 2nd this year 
(1908), at about 6.30 p.m., I saw a Bat fly from a farm-building 
in the village of Brook, near Witley. It at once aroused my 
attention as a species I was not familiar with, and every evening 
it made its appearance at the same time almost to the minute. 
On the evening of the 8th I shot it, and it proved to be the above 
species. This is as far as I know the first record for Surrey. 
Its flight closely resembled that of a Pipistrelle, only not so 
swift and without so much of the numerous twists and turnings 
peculiar to that species. It confined itself to a given area, flying 
round this with due regularity, and it frequently dipped on the 
surface of a duck-pond. The specimen was a male, and appa- 
rently the only one of its species about. It made a shrill and 
sharp squeak at intervals, which was audible some way off. 
HepeGEnoe (Hrinaceus europeus).—Found in suitable places 
everywhere, approaching very close to the Metropolis, as I heard 
of one taken in a garden at Dulwich. 
Mots (T'alpa ewropea).—Abundant, especially so in the parish 
of Witley, occurring in such numbers that over a thousand were 
caught in a few months in a one-acre field. The question has 
often arisen: Are Moles beneficial to the agriculturist or not? 
On my questioning a gentleman farmer on the subject he kindly 
gave me the following information :—‘‘ Moles come after the 
Wireworm, and in themselves do good. In fields where this pest 
is not found Moles also are absent or very scarce. Did the Mole 
not raise heaps of earth it would unquestionably be of great 
service to the farmer, but the Mole-heaps damage the grass, and 
in some places kill it quite off. The question now arises: which 
is the more harmful, the Mole or the wireworm? One spot I 
knew of, a road divided two fields; in the one Moles and wire- 
worms were abundant, in the other neither were found. It 
would be interesting to know the reason of this. The two fields 
to all intents and purposes were identical, both producing grass- 
crops. A good dressing for a field infested with wireworms, I 
am told, is a mixture of basic slag and salt, destroying the wire- 
worms, and hence keeping the Mole away.” Mr. Bentham 
kindly sent me the following note :—‘‘ During August last (1907), 
P22 
