Disclosed herein is an insect trapping device comprising an inner passageway structure defining an inner passageway which, when in an upright orientation, extends from an insect entry zone to an insect delivery zone, the inner passageway structure bordered by at least a pair of opposed insect-facing traction-reducing boundary surface regions to cause an insect to progress toward the insect delivery zone under gravity, with each boundary surface region including at least one of at least a pair of electrode surface regions, wherein each electrode surface region is configured for operative coupling with an electrode power supply to deliver electrical power thereto, the electrode surface regions configured to form an electrocution zone therebetween, with a designated spacing which is configured to initiate electrocution of an instance of the insect descending through the electrocution zone.