Insect traps are valuable research tools for determining when infestations occur and which species of insects are present. Insects can be controlled more readily when their populations, species, and flight habits are known. The trap described in this publication was designed for use by entomologists to study the flight habits of insects, particularly the green peach aphid, Myzus persicae (Sulzer). This report describes its design, construction, and operation. The trap consists essentially of (a) a baffle, painted chrome yellow to attract aphids, (b) a collection device, (c) a mechanically operated device to collect insects in separate containers for specified time periods, and (d) a mounting frame.