To simplify removal of the catch a waxed paper cup just large enough to fit tightly is placed in the mouth of the jar and the insects drop into this cup, where they are promptly killed by the gas from the cyanide, which enters through small holes punched in the sides of the paper cup for that purpose. Three legs bolted to the tube extend below it for feet and above it as a support for the roof and the electric light bulb. The bulb is attached through a block of sponge rubber which absorbs vibration from the fail and thereby reduces breakage of the lamp filaments. The exterior of the trap is usually painted green to harmonize with vegetation in the yard where it may be placed. All fastenings should be made with brass screws and nuts to avoid rusting and consequent loss of time when servicing the trap.
Upper bolt is reached by lifting screen from mouth of trap.
Induction type motor. Do not use motor with brushes. or radio reception near the trap may be interfered with. Use 25-watt bulb. Sponge rubber to absorb vibration. One extended to support light receptacle.