The galleries are ready in a few days, especially as those of the
previous year are employed with the aid of a few repairs. The other
Cerceres, so far as I know, have no fixed home, no family inheritance
handed down from generation to generation. A regular gipsy tribe, they
settle singly wherever the chances of their vagrant life may lead them,
provided that the soil suits them. But the Great Cerceris is faithful
to her household gods. The overhanging blade of sandstone that
sheltered her predecessors is adopted by her in her turn; she digs in
the same layer of sand wherein her forbears dug; and, adding her own
labours to those which went before, she obtains deep retreats that are
not always easy of inspection. The diameter of the galleries is wide
enough to admit a man’s thumb; and the insect moves about in them
readily, even when laden with the prey which we shall see it capture.
Their direction, at first horizontal to a depth of four to eight
inches, describes a sudden bend and dips more or less obliquely now to
this side, now to that. With the exception of the horizontal part and
the bend, the direction of the rest of the tube seems to be regulated
by the difficulties presented by the ground, as is proved by the twists
and turns observed in the more distant portion. The total length of the
shaft attains as much as eighteen inches. At the far end of the tube
are the cells, few in number and each provisioned with five or six
corpses of the Beetle order. But let us leave these building details
and come to facts more capable of exciting our admiration.
The victim which the Cerceris chooses whereon to feed her grubs is a
large-sized Weevil, Cleonus ophthalmicus. We see the kidnapper arrive
heavily laden, carrying her victim between her legs, body to body, head
to head, and plump down at some distance from her hole, to complete the
rest of the journey without the aid of her wings. The Wasp is now
dragging her prey in her mandibles up a vertical, or at least a very
steep surface, productive of frequent tumbles which send kidnapper and
kidnapped rolling helter-skelter to the bottom, but incapable of
discouraging the indefatigable mother, who, covered with dirt and dust,
ends by diving into the burrow with her booty, which she has not let go
for a single moment. Whereas the Cerceris finds it far from easy to
walk with such a burden, especially on ground of this character, it is
a different matter when she is flying, which she does with a vigour
that astonishes us when we consider that the sturdy little creature is
carrying a prize almost as large as herself and heavier. I had the
curiosity to compare the weight of the Cerceris and her victim: the
first turned the scale at 150 milligrammes; [6] the second averaged 250
milligrammes, [7] or nearly double.
Public-domain text, read in full here on John Shaqi.
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