Book reviewed in this article:MITES OF MOTHS AND BUTTERFLIES. By Asher E. Treat.THE SWALLOWTAIL BUTTERFLIES OF NORTH AMERICA. By Hamilton A. Tyler.APHIDS. By Roger Blackman.APHID PARASITES (HYMENOPTERA, APHIDIIDAE) OF THE MEDITERRANEAN AREA. By Petr Stary.MAN'S PLAGUE. INSECTS AND AGRICULTURE. By V. G. Dethier.STUDIES IN BIOLOGICAL CONTROL. Edited by V. L. Delucchi.