two dorsal abdominal lobes, and the excretion of a drop of honeydew. Ctenochiton elœocarpi, like all Lecanids, exhibits at the abdominal extremity a deepish narrow cleft, on the dorsal side of which are two roundly-triangular protruding lobes. In a specimen of the second female stage it may be seen, under the microscope, that these lobes lie in a shallow groove formed by the sides of the cleft. At intervals, which may vary in length, the insect protrudes rapidly from beneath the lobes a cylindrical organ (figs. 1a, 1b,), composed of a basal, thickish tube, bearing at its extremity another, similar, but much thinner. The organ being pushed out to its full extent, a minute globule of transparent glutinous fluid appears at its extremity, rapidly expands, something like a soap-bubble, and then suddenly breaks and falls in spray on the leaf. The excreting organ is then rapidly withdrawn. I do not entertain much doubt that the process just described is the same used by all the “honeydew”-secreting Coccids. Some of these, like Rhizococcus fossor, Planchonia epacridis, etc., produce much less than others; but even they, I think, excrete some. The observation which I have made as above throws a light upon an organ which I noted as occurring in the second female stage of Cœlostoma zœlandicum, in vol. xiv. of the “Transactions,” page 227, and in the adult female of the same insect in vol xii., p. 295. I then considered this organ as an oviduct, remarking, however, that I could not see its use in the pupal stage. I never saw it exserted, and was not aware that it ever was so; but it seems clear to me now that this is an organ similar to the one excreting honeydew in Ctenochiton elœocarpi, and it probably occurs in at least most of the other Coccids. But observation of this organ is extremely difficult, if not in most cases impossible. The best and most careful work on the anatomy of Coccids is that of Professor Targioni-Tozzetti, “Studie sulle Coccineglie” (Milano, 1867); and there is no mention in it of any such organ. I have carefully, at various times, examined in every way many specimens of different genera, and, with the exception of Cœlostoma (an exceptionally gigantic species), I have not seen it. There is no doubt of the quantity of glutinous matter secreted by Coccids; but, as observed above, the origin and mode of the excretion have not been noticed before. There does not appear to be any other organ, or any other portion, of the insect's body, producing this secretion; and it may well be that the absence of insects feeding on the honeydew may be due to the fact that the excreting organ, instead of being constantly protruded like the cornicles of the Aphididæ, is only now and then exserted and then withdrawn. In many genera,