If you cross the bridge and follow the road, just as it bends to the right keep going straight. Up here are more Mygga and further on are some Skellets and Psylings. We were hunting here and it popped on us while we were in battle. We killed the Skellet and tried to drop him. I went OOP (7 SHM) and the 9 Zerker and 8 Savage both died. I managed to run far enough to get away. He was purple to me and we got him down to about 15% hp, was interested to see what it dropped.
This looks just like a Mygga. Saw it one day when I crested the hill. It was killing all the other Mygga. Conned purple to me with my Savage (lvl 7) and aggressive. Did not stick around long enough to see if it would attack me when it killed them all.