I only reciently began hunting in the east commons and saw one of these for the first time. I had to kill it out of pure scientific curiosoty. Now im stuck with a Leaf Scarab Tarsus, which is obviously a new quest item but im too busy or lazy to track it down myself. Anyone who might know this quest please post it for me, I'll check back now and again. Just for purly scientific reasons mind you.
Leaf Scarab Tarsi, leaf scarab sternite, giant leaf scarab carapace, giant leaf scarab tergite, large leaf scarab sternite, large leaf scarab patella and large leaf scarab eyes are used for Human SK armor (Dismal Knight Armor).
I believe that the no drop items on the large leaf scarabs are for the Human Shadow night armor quests. So if you kill one, please hail your friendly sk. Thanks.