Tribe Blondeliini Robineau-Desvoidy, 1863

As Ophirion and Lixophaga include parasitoids of Neotropical Vespidae, the following characters can be used to identify males and females of both genera:

1. Eyes bare or with short hairs (Fig. 2E); ocellar setae absent; frontal setae above pedicel reclinate and continuous to reclinate orbital setae (Fig. 1B); 2 katepisternal setae; wing with strong costal spine (Fig. 2C); abdomen without discal setae on intermediate abdominal tergites ..................................... Ophirion

- Eyes bare; ocellar setae present; frontal setae inclinate (Fig. 4E); 2–3 katepisternal setae; wing with weak costal spine (Fig. 4C); abdomen with or without discal setae on intermediate abdominal tergites ......................................................................... Lixophaga