Xerophytes.Plants which grow in very dry soils; e.g., most hens, Ammophila (Psamma) arenaria, Elymus arenarius, Anasis aretioides, Zilla macro ptera, Sedum acre, Bupleurum spinosum, rtemisia herba-alba, Zollikofferia arborescens.
Pelopoeus hunts spiders, while Ammophila catches caterpillars for the benefit of her young.
Fabre states that the lastnamed insect uses a stone for the temporary closing of her burrow, and the Peckhams have seen a female Ammophila take a stone between her mandibles and use it as a hammer for pounding down the earth over her finished nest.
Ammophila arundinacea (or Psamma arenaria) (Marram grass) with its long creeping stems forms a useful sand-binder on the coasts of Europe, North Africa and the Atlantic states of America.
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