Length, 16 to 18 millimetres. [56] Black, thickly and deeply spotted.
Shield, raised like a nose, that is to say, forming a convex
projection, broad at the base, pointed at the tip and resembling one
half of a cone divided lengthwise. Prominent crest between the antennæ.
A yellow streak above the crest, yellow cheeks and a large yellow spot
behind each eye. Yellow shield, with black dot. Mandibles, iron-yellow,
with black tips. First four or five joints of the antennæ, iron-yellow;
the rest brown.
Two dots on the prothorax, the wing-scales and the postscutellum
yellow. First segment of the abdomen has two round spots. The next four
segments have on their hinder edge a yellow band cut deeply into the
form of a triangle, or even broken right off; and this is more
noticeable in the less distant segments.
Under-part of the body, black. Legs, iron-yellow all through. Wings,
slightly bronzed at the tip.
The above is a description of the female. The male is unknown to me.
In colouring, this species approaches Cerceris labiata, from which it
differs more particularly by the shape of the shield and by its size,
which is much larger. Observed near Avignon in July.
I dedicate this species to my daughter Antonia, whose assistance has
often been of great value to me in my entomological researches.
B
CERCERIS JULII.—H. FAB.
Length, 7 to 9 millimetres. [57] Black, thickly and deeply spotted.
Shield, flat. Face covered with a fine silvery down. A narrow yellow
band on either side on the inner edge of the eyes. Mandibles, yellow,
with brown tips. Antennæ, black above, pale russet below; lower surface
of their basilar joints, yellow.
On the prothorax two small yellow dots, some distance apart; yellow
wing-scales and postscutellum. A yellow band on the third segment of
the abdomen and another on the fifth segment; these two bands are
deeply hollowed on the fore-edge, the first into a semicircle, the
second into a triangle.
Under-part of the body, entirely black. Black hips; thighs of the
hind-legs, all black; those of the two front pairs, black at the root
and yellow at the end. Legs and tarsi, yellow. Wings slightly
smoke-coloured.
Female.
Varieties: 1. Prothorax without yellow dots. 2. Two small yellow dots
on the second segment of the abdomen. 3. Wider yellow band on the inner
side of the eyes. 4. Front of shield edged yellow.
The male is unknown to me.
This Cerceris, the smallest in my district, feeds her larvæ on very
small-sized Weevils, Bruchus granarius and Apion gravidum. Observed
near Carpentras, where she builds her nest in September, in the soft
sandstone locally known as safre.
C
BEMBEX JULII.—H. FAB.
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