The sparkles of incident sunlight reflected by the armour of this small and fast female Omalus biaccinctus ^[1] (det. Milo van Loon) made it easy to detect on the Salvia plants on which she was hunting. A new garden species!

This rare wasp has several species from the genus Passaloecus as host, among which the garden resident P. gracillis ^[2]. She does not parasitise the wasp larvae but the aphids that are collected by their host for their offspring ^[2].

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