MOLES. 330 
o 
by which not only are the roots of the plants disturbed, but the whole row may be 
dried up. Moreover, it appears pretty certain that field-voles will take advantage 
of runs driven in such localities as convenient points from which to make inroads 
on the sprouting seeds or the roots of the young plants. Then, again, in addition 
to the unsightliness of a host of mole-hills in a garden, such elevations are incon- 
venient in a field of standing grass, as they impede the process of mowing. From 
these and other circumstances, farmers and gardeners generally unite in a war of 
extermination against the mole, although there can be no doubt but that in many 
respects its visits are a distinct advantage to its destroyers. 
It is well known that male moles are more numerous than females, and this 
seems to be explained by a writer in the /%eld newspaper, who states that a family 
“of moles appears to consist of five members, in the proportion of four males to one 
female—this as a rule, though with many exceptions. In the course of my experience 
I have never caught more than five in succession in the same run; and this, there- 
fore, appears to be the limit.” It is well known that moles have the habit of 
feeding at regular hours during the day, and that they may be found at work 
at eight, twelve, and four o’clock. In regard to mole-catching, it is mentioned 
that, “when setting a trap in light crumbling soil, as in a flower-bed, care should 
be taken to remove only sufficient earth to allow of the trap being put in, and 
the hole leading each way should be carefully cleared, so as to allow the mole 
a free passage, or he will infallibly dive underneath your trap. <A piece of slate 
put at the bottom of the run is a good preventive of this kind of thing.” Like their 
North American relatives, moles swim well, and will take to the water readily. 
According to Mr. Blanford, the short-tailed mole, which is abundant near the 
Himalayan station of Darjiling, at elevations of from about five thousand to eight 
thousand feet above the sea-level, “inhabits the deep bed of black vegetable mould 
found wherever the original forest has not been destroyed. This mould contains 
earth-worms and larvee of insects, the chief food of moles, in abundance. Jerdon 
noticed that the runs of 7. micrwra often proceeded from the base of one great oak 
to that of another. Such runs are not marked by mole-hills, as in the ease of the 
European species.” 
Fossil moles are found throughout the Tertiary strata of Europe 
from the Upper Eocene deposits of Central France. As far down as 
the succeeding Lower Miocene beds these extinct species seem to belong to the 
existing genus Talpa, but the Upper Eocene species, on account of the arm-bone 
(humerus) being rather less expanded, has been regarded as representing a distinct 
genus, Protalpa. The occurrence of these Tertiary moles is interesting, as they 
show how extremely ancient must be the insectivorous type of Mammals, since even 
at those early epochs the remarkable peculiarities distinctive of the skeletons of 
the existing members of the group had already attained their nearly complete 
Extinct Moles. 
development. 
Yellow-Tailed Our notice of the Mole family may conclude by a reference to the 
Mole. yellow-tailed mole (Scaptonyx fuscicaudatus) of Eastern Tibet. This 
mole, which has only two pairs of lower incisor teeth, and consequently but forty- 
two teeth altogether, differs from the true moles in the considerably lesser width of 
the fore-feet, and thus approaches the mole-shrews noticed on p. 334. 
