Forum Entomologi Italiani

Another wasp species building mud nests all around buildings on walls, wood, etc.; about 2 cm

Hi Lenny,
very nice wasp! Considering the shape of mandibles and the body structure I would say Trigonopsis sp. (Sphecidae) though, as many diagnostic features are not visible in the pictures, I cannot completely rule out another possibility, genus Podium.
I think the former is much more likely, however.
Maurizio

Ciao Maurizio, thank you for the ID! Now I know they are very useful as they catch our cockroaches in the (open) kitchen. Maybe some further pictures can help to be sure.

Hi Lenny,
very recently I had the chance to study some specimens of Trigonopsis and now I can say that your insect is a Trigonopsis cameroni Kohl, 1902, the only species of the genus known to occurr also north of Panama.
Beautiful pictures!
Maurizio

Thanks a lot, Maurizio for having another look on my pictures!! Finally we know the species

You are welcome... if you will post other pictures of Sphecidae (sensu lato) I will be happy trying to identify them.
Best wishes!
Maurizio