Let me end by giving a few specific details. The eggs of the
Black-horned Pentatoma (P. nigricorne) are cylindroid in form, the base
being a segment of a sphere. The lid, bearing a broad white band at the
edge, frequently, but not always, has in the centre a transparent
protuberance, a sort of knob like that on the lid of a preserve-jar.
Its entire surface is smooth and glossy, with no other ornament than
its simplicity. The colour varies according to the degree of maturity.
When recently laid the eggs are of a uniform straw-yellow: later, owing
to the gradual organization of the germ, they turn a pale orange, with
a triangular bright-red patch in the centre of the lid. When empty they
are a magnificent, pellucid opal-white, except the lid, which has
become transparent as glass.
Of the clutches of eggs obtained the most numerous was a patch of nine
rows, each containing about a dozen eggs. The total was thus about a
hundred. But usually the number of eggs is smaller than this, amounting
to only half as many or less. Groups containing about a score of eggs
are not uncommon. The enormous difference between these extremes
testifies to multiple layings at different spots, which, in view of the
insect’s rapid flight, may be at quite a distance from one another.
This detail will be of value when the time comes.
The Pale-Green Pentatoma (P. praesinum) moulds her eggs in little
barrels, ovoid at the bottom and adorned over their whole surface with
a network of fine polygonal meshes in relief. Their colour is a sooty
brown, and, after the hatching, a very light brown. The largest groups
of eggs contain thirty or so. It is probably to this species that the
eggs belong which first attracted my attention on a sprig of asparagus.
As for the Berry Pentatoma (P. baccarum) here we again have barrels
with rounded ends, covered all over the surface with a tracery of
meshes. At first they are opaque and dark; then, being empty, they
become translucent and white or pale-pink. Of these eggs I find groups
of fifty and others of fifteen or even less.
That blessed plant of the kitchen-gardens, the cabbage, gives me the
Ornate Pentatoma (P. ornatum), striped black and red. The eggs of this
species are the prettiest of all in colouring. They are like little
casks with the two ends convex, especially the lower. The microscope
shows us a surface engraved with pits, like those of a thimble,
arranged with exquisite regularity. At the top and bottom of the
cylinder there is a broad dull-black band; on the sides is a wide white
belt with four large black spots symmetrically placed. The lid,
surrounded with snow-white filaments and edged with white, swells into
a black dome with a central white spot. In short, a funeral urn, with
its violent contrast of coal-black and creamy white. The Etruscans
would have considered it a magnificent model for their burial vessels.
Public-domain text, read in full here on John Shaqi.
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