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Hello,

While looking for Coleoptera living with ants, one member of our french forum found those Diptera larvae :

Calmont B. : France : 22/6/2009 : Sain-Julien du Gua : 07
altitude non renseignée - taille : 20 mm
ref:46758


Calmont B. : France : 22/6/2009 : Sain-Julien du Gua : 07
altitude non renseignée - taille : 20 mm
ref:46759

As the larva was trying to leave the nest, the ants brought it back.

Any clues ?
Somebody proposed a Volucella larva, but they are noted to be hosts of bumblebee and wasp nests. Not of ant nests.