Where to find killer beetles on monster hunter freedom unite

bring a bugnet to catch some bugs in some bug catching spots while you're doing a mission.
the dessert has lots of killer beetles
there's one bug catching area in the cave and on the area connecting the 2 big dessert are ( the farthest area to the right, the one with a small pool of water)
your 2nd, 3rd, 4th insect thicket in the farm also has some killer beetles as well as the bug tree.