The VILAINE BĘTE
| Hook | Wet type, 8-10 |
| Thread | Yellow |
| Tails | A bunch of wolf hair (base cream and black tip) extending well toward the bend of the hook. |
| Body | Yellow seal fur dubbing |
| Rib | Brow floss silk |
| Thorax | Boar fur |
| Hackle | Grey partridge dyed in yellow |
| Weight | Lead under the thorax |
| Creator | Pierrot Vandervondelen |
| Use | Wet fly for april untill june. Ephemera Danica imitation. |