Favoritos de varnya

Old observation. Found on the rocks right on the waters edge. Really unusually colouring. The Landcare Hymenoptera key isn't working for me, so help with this one much appreciated https://resources.landcareresearch.co.nz/InteractiveKeys/family_key/Key/Guide%20to%20the%20Family%20Level%20Identification%20of%20Hymenoptera%20in%20New%20Zealand.html