''Stilbum cyanurum'', is a large

Old World The "Old World" () is a term for Afro-Eurasia coined by Europeans after 1493, when they became aware of the existence of the Americas. It is used to contrast the continents of Africa, Europe, and Asia in the Eastern Hemisphere, previously ...

species of

cuckoo wasp Commonly known as cuckoo wasps or emerald wasps, the hymenopteran family Chrysididae is a very large cosmopolitan group (over 3000 described species) of parasitoid or kleptoparasitic wasps, often highly sculptured, with brilliant metallic color ...

s (insects in the family Chrysididae).

Description

''Stilbum cyanurum'' can reach a length of about . The colour range of this widespread species is considerable, with typical specimens mostly bluish green to bluish-violet, but varying to reddish gold.Chrysis.net
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Biology

These wasps lay their eggs in the nests of various

potter wasp Potter wasps (or mason wasps), the Eumeninae, are a Cosmopolitan distribution, cosmopolitan wasp group currently considered a subfamily of Vespidae, but sometimes recognized in the past as a separate family, Eumenidae. Mud dauber wasps, which al ...

s ('' Delta unguiculatum'', '' Katamenes arbustorum''), sphecid wasps (''

Sceliphron caementarium ''Sceliphron'', also known as black mud daubers or black mud-dauber wasps, is a genus of Hymenoptera of the Sphecidae family of wasps. They are solitary mud daubers and build nests made of mud. Nests are frequently constructed in shaded niche ...

'', '' Sceliphron destillatorium'' and '' Sceliphron madraspatanum''), and megachilid bees (''

Megachile The genus ''Megachile'' is a cosmopolitan group of solitary bees, often called leafcutter bees or leafcutting bees; it also includes the resin bees and mortar bees. While other genera within the family Megachilidae may chew leaves or petals ...

'').

Distribution

This widespread species is present in southern Europe, North Africa, the Afrotropical Region, Australian Region, East Palearctic ecozone, Near East, and Oriental Region.Fauna europaea
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References

Insects described in 1771 Chrysidinae Insects of North Africa Taxa named by Johann Reinhold Forster {{wasp-stub