Illustrations of insect behaviour often convey the information more clearly than written descriptions. Since most of us cannot draw well and drawings do not depict the quality of movement, the alternative lies with photography. Individual frames clippkd from a motion picture sequence probably show a pattern of behaviour most suitably, but not all research establishments possess the necessary equipment. Even Gith cine apparatus, the difficulty of holding the subject within the field of focus and still permitting it to behave normally, presents a problem.