Omalus biaccinctus du Buysson - Spain

[Naturalmente]

When I took a picture of this wasp I don´t think it might be a crisidae,it was very small and did not see it shine, but when I enlarge the photo in the computer , I was surprised by the colors and brightness, Which Chrysididae can be?
Take it in Barcelona, Sierra de Collserola.

[Euchroeus]

Hola Pedro,

this picture is very, very interesting

The specimen should be Omalus biaccinctus du Buysson.

But I wonder what it is doing. It is eating (chewing?) that essence... I see its open mandibles.
But why the abdomen is curved down?

Do you know what kind of essence was that?

Thank you very much.
Paolo

[Naturalmente]

I think she was cleaning the legs, spent some time in that position and when I approached her with the camera then flew away.
I also think that sometimes they are wrapped to take a defensive position, but this was not the case

[pietsje]

I see them doing that after visiting Lice (licking the honeydew of the hairs on the abdomen). After curling up in a ball. (See your topic on hymis Paolo).I see that behaviour of Pseudomalus violaceus (Aphids on my roses and Lonicera) and of Pseudomalus auratus (Aphids on Symphytum officinale and other plants). Often the plants are visited by ants. I have a hunch that the Pseudomalus is attrackted not only by scent of the aphids but also of the ants. Ants---> Aphidcolony-----> honeydew!