That are wonderful figurines. Are all PV?
No, PV only did a set of 8 beetles (I have them reviewed here already, here:
http://animaltoyforum.com/index.php?topic=1940.0), most of these are by XX.
I have to admit I am a specialist on arthropod figures and I am still missing half the XX beetles (Calosoma, Leptinotarsa, Cotinis, Pyrrchroa, Cicindela, Cassida, Chrysochus, 2 versions of Adalia, possibly others...).
In addition to PV and XX, your first (group) photo shows the Melolontha melolontha by Bullyland.