Posted by skrylten on 22-08-2019 18:31
#21
I found a, for me, new feature to separate them in this Chinese paper
https://www.tandf...014.954019.
They talk about
"two subgroups according to whether the centre of the scutellum
ventrally is with hairs or without hairs, namely the Helina annosa-subgroup and
the Helina evecta-subgroup."