ABSTRACT
In observing students' flies and/or inspecting their grooming data, they may have noted a strong tendency for certain acts to alternate with others. Grooming seems to divide into discrete bouts that have sudden beginnings and endings, and that seem never to mix front and rear end movements. The easy availability of various genera of flies, and the comparative stereotypy of their grooming movements, could form the basis for an interesting comparative study. While students' flies are re-chilling, prepare a warm dusty vial by putting cornstarch into it, closing the lid, and shaking the vial. Transfer the fly to the warm dusty vial, and return the empty chilling vial to the ice bath. Wait 1 min for the fly to warm up, and then record its behavior for 10 min as before. Place the amputee in the warm dusty vial once again. Wait 1 min for it to warm up, and record its behavior for 10 min as before.
