Parasitic Wasp - Diphyus quadripunctorius, click for a larger image
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Parasitic Wasp - Diphyus quadripunctorius, click for a larger image, photo licensed for reuse CCA4.0
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Parasitic Wasp - Diphyus quadripunctorius
Family - Ichneumonidae

Diphyus quadripunctorius is a parasitic wasp with distinctive black and yellow markings on both the femora (thighs), and abdomen which has two yellow bands, the antennae are a uniform grey.  A sexually dimorphic species in that whilst the males ♂ are seen in this bright black and yellow colouration, the females ♀ retain the leg colouration but their abdomen is plain orangey brown with a hint of a single yellow band.  Their antennae, again grey, have a white band approximately half way along.

Found in woodland edges, grasslands and meadows during late spring and early summer their distribution and numbers are unknown in the UK.  Approximately 2-4cm (0.8-1.5in) long with a distinctive "waisted" outline seen in many parasitic wasps.

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