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Chrysidids
are solitary wasps and in their life they are strictly linked
to other solitary wasps (Sphecids,
Apids, etc.), with whom they share the same environments.
Generally chrysidids live in microhabitats characterized by
environmental particularities which facilitate their recognition:
flowers, arid and sandy solis, old woods exposed to the sun,
pebbles, infested plants, etc.
The
most favorable environments are those characterized by xerothermic
climatic periods, during which the curve of the summery medium
temperatures exceeds the curve of the medium precipitations
(Walter's climograms). In a more generalized view, the chrysidids
prefer subtropical-Mediterranean climates, with warm dried
summery atmospheres tending to an arid climate with strong
insolation and water deficit for the vegetation, which will
be represented by thermophilous species.
In
detail, chrysidids are bound to extremely narrow microhabitats,
comprising places of rest and of parasitic activity. It's
not difficult to see some specimens on uncovered soils
already
inhabited by other wasps, or near the worm-holes in wood
searching for their nests. In the periods of flower blooming
some species
rest on inflorescences (Umbrelliferae,
Compositae and Euphoribiae just to mention some) or are attracted
by the sweet fluids on vegetables infested by Aphids. In other
cases, some chrysidids can rest on rocks, leaves and lumber
exposed to the sun, in correspondence of paths or along the
banks of the rivers. Optimal observation places are the dried
walls delimiting the agricultural fields and the walls exposed
to the sun of the country houses.
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