Flesh crawlers are the result of starved creatures, which turned into feeding on bypassing players to quench their desire for food. Despite all of this, they are fairly easy to defeat. For members, flesh crawlers are great for herb and charm collecting.
Charm Drop Rates
These are good training to those who are inexperienced or low-mid leveled. This is especially helpful to those who are free to play. They spawn quickly, and have a very low level in attack and strength. Thus, you should be able to kill them efficiently. They require minimal food.
I don't think insect repellant will work...
Starved ancient effigy
Coins, Ashes, Sceptre bottom, Black full helm, noted Iron ore (3-7), Nature rune (5), Fire rune (42-84), Body rune (3-12), Mud rune (3-14), Dust rune (3-7) Iron ore, Silver bar, Nature talisman, Rune javelin (5), Grimy herbs, Gold charm, Crimson charm, Green charm, Blue charm.