118 Colonel C. Swinhoe on were pushed to extremes at the time of the formation of the young segments (when presumably they are in a plastic condition), and if at the same time the intersegmental divi-sion were suppressed, the result would be a "double segment" of the kind that has been described. It is difficult, of course, to understand what force or forces may have been operating to bring about such a condition, but it is suggested that some such process may have been the cause of this malformation, rather than that the specimen is a " double monster." Although a number of records are to be found in literature of segments of T. saginata with two opposite or nearly opposite genital pores, I have been unable to find an account of a case similar to the present example, with two bilaterally symmetrical sets of internal organs. A very curious case has, however, been described and figured by Blanchard *, where a single segment, in a chain otherwise consisting of quite normal segments, contained a set of organs at each end, both leading into a common uterus in the normal median position. The ovary, yolk-gland and associated organs at the posterior end of the segment were arranged in the usual order, but those at the anterior end were reversed, so as to form a "mirror-image" of the former. Each set had its own ducts and pore, the pores being situated one on either side of the segment, but not quite opposite to each other. Although this has been referred to as a single segment, it ought perhaps to be regarded as two segments, since there was a partial transverse division on one side. XVII. — Indo-Malayan and Australian Noctuidse. By Colonel C. Swinhoe, M.A., F.L.S., &c. Subfamily Sarrotheipinje. Characoma perfecta, nov. S . Upperside : fore wing grey irrorated and suffused with pale black, a deep black patch on middle of costa angled downwards, narrowly extending on costa to near apex, and also to the base of the wing, its inner edge with a white patch irrorated with black and containing on its lower part three black spots and another below near the * Bull. Soc. Zuol. France, xv. 1890, p. 1G6. The writer is indebted to Prof. A. Itailliet for drawing -his attention to this case.