A trap for spiders and other insects is provided. The trap is especially useful for catching brown recluse (Loxosceles reclusa) spiders, whose bites are extremely harmful. The trap need not utilize chemical attractants or other behavior-modifying environmentally harmful chemicals, or food bait or lights to attract the spiders. In embodiments, the internal volume of the trap is shaped as a triangular prism with open triangular faces and openings in the front. At least a portion of the floor is coated with bug adhesive. The trap can be packaged as a kit including a flat sheet that can be folded a three-dimensional shape. In a useful embodiment the front includes spaced vertical struts. Methods and kits for making using the traps are also provided.