My grandad gave me these bugs and all I know about them is that they're very old! I'm selling them on Ebay because I don't trust my children with them and I want them to go to a good home, but I'd like to know what they are too. Does anyone have any ideas? They're about 16 mm long.
I am not a specialist in this field, but your specimens seem to me very alike to this one, which was identified as Desmonota variolosa.
I have found this beetle under different names, but this site states that the right name should be Polychalca punctatissima (Wolf, 1818).
Distribution: Brazil and Argentina
in your garden?
According to the quoted website, this species is related to Cordia cylindrostachya (Black Sage).
May be present this exotic plant in your garden?