Catching Flying Fruitflies 1. Put a clear plastic bag over the opening of a glass jar. 2. Fix it with a rubber band and cut off the bottom of bag. 3. Turn bag funnel-wise into jar, insert bowl with banana and yeast, and wait for flies to get trapped. 4. Make a sieve-tube to fit your vacuum cleaner. The tube has a small opening in the bottom end to diminish the suction from the vac, and a wire mesh halfway up, preventing flies to get sucked into the vac. 5. Place sieve-tube in vac inlet. 6. Insert the tube into the fly-trap to collect flies. 7. 7. Hold hand over opening to prevent flies from escaping, empty sieve-tube into glass jar containing a small amount of vi- tamin powder. Shake. 8. The powder makes the flies unfit for flying. 9. Shake portions of flies into ter- rarium. The flies will be easy prey as they are walking around trying to rid themselves of the vitamin dust.