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I've found this nest in Burgo de Ebro, Aragon, Spain, in an arid steppe zone dominated by Rosmarinus, Ephedra, Pinus halepensis and Gypsophila hispanica. The nest was big as a ping-pong ball and it have various cells, each one full of parasitic larvae aond only one with the original larvae. Both species for identify. I tried to evolucionate it to see what hymenoptera can emerge, but two or three months after, the larvae die...





What can be?

Thanks.

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Eumenidae with Meloidae larvae.....perhaps!:)

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Thanks Cthirion... I think that is not Eumenidae... the nest is too big! and various cells... I thinks that is more likely to be a Sphecidae nest. I've found in the same zone a big and beautiful Prionyx viduata. Can be a Prionyx nest?

Yes, can be Meloidae... also Diptera or Hymenoptera... I only have real interest in the big larvae...