About two months ago there was begun, under the auspices of the University of California Citrus Experiment Station, the task of monographing, as adequately as possible, the Citrus Coccidae of the world. Obviously, the scope of such an undertaking is such that an enormous amount of laborious work is required in the compilation and synthesis of scattered and partially “buried” scraps of recorded data. Even this collated information will not meet the requirements of our problem. This is particularly the case as regards geographical distribution, alternate and preferred hosts, and proper correlation of the data of distribution and damage with that of the geographical distribution and economic status of Citrus itself.