Posted by John Carr on 10-04-2019 13:45
#2
In tribe Exoristini the bend in vein M is a right angle with the distal section curving towards wingtip. A similar curve in M is also common in tribe Polideini (along with hairy eyes). Typically the distal part of M in Polideini approximates a quarter circle while it is more elongate in Exoristini.
Look for the strongly differentiated upper orbital bristles typical of Exoristini.