Flesh Crawlers are the result of starved creatures, turned to feeding on bypassing players for sustenance. Despite this, they are fairly easy to beat. For members, flesh crawlers are very good for herb collecting.
Charm Drop Rates
These are fairly good training for low-mid level free players. They spawn very quickly, and have a low attack and strength level, so you should be able to kill them efficiently.
I don't think insect repellant will work...
Starved ancient effigy
Sceptre bottom, Coins, Ashes, noted Iron ore (2-7), Iron ore (1), Nature rune (5), Fire rune (42-48), Body rune (3-12), Silver bar, Grimy herbs, Dust rune (3-9), Nature talisman, Rune javelin (5), Gold charm, Crimson charm, Green charm, Blue charm, Black full helm