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286 the most whimsical figures in various directions; sometimes projecting over the head like a helmet, at others forming a tail, which looks quite artificial, and again assuming the character of ears or the horns of animals." Fig. 1. C. globularis bears a cylindrical horn on the anterior part of the thorax, divided into four branches, each of which terminates in a hairy ball; head black; abdomen fulvous; feet yellow. Length about three and a half lines. Fig. 2. C. furcatus, a larger species five lines in length; the prothoracic expansion turned backwards, and projecting from the body, the apex bifurcated; it is a native of Brazil, the former of Surinam and some other parts of America. Fig 3 represents a new and singularly monstrous species from Mr. Hope's collection, who obtained it from that of the late Rev. L. Guilding. Mr. Westwood names it C. biclavatus. The colour is obscure brown; prothorax very large, the frontal part elevated into a long thick punctate and setose horn, the tip of which is dilated into a rounded knob; the middle part also elevated into a similar horn, but shorter; tegmina brown; at the posterior angle there is a pale spot, as well as in the middle of the posterior margin. Length three lines; expansion of wings six. A native of South America. Latreille includes among the homopterous hemiptera the, comprising the family coccidæ; also the , containing Psylla, Aphis, and Thrips. Mr. Haliday has recently formed the latter into a separate order, which he names Thysanoptera.