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Show 1877.] COLLECTION MADE BY H.M.S. ' PETEREL.' 91 5. DELPHAX SIMULANS. Delphax simulans, Walker, Cat. Homopt. ii. p. 355. n. 24. Charles and James Islands (C. Darwin). 6. DELTOCEPHALUS OBLIQUUS. Acocephalus obliquus, Walker, Cat. Homopt. iii. p. 851. n. 23. 7. JASSUS PLANUS, n. sp. Above sordid testaceous ; pronotum in front, and head, ochraceous, the latter with a greyish spot in the centre of the ocelli; tegmina pale testaceous, hyaline ; pectus and venter pale testaceous ; rostrum and legs sandy yellow ; eyes brown ; ocelli black : head very broad, exceedingly short from the vertex hindwards, convex in front, concave behind ; thorax convex in front, the sides converging, subsinuate, and ending in a truncate slightly convex line behind ; scutellum triangular, all the sides slightly sinuate; tegmina extending considerably beyond the abdomen, rather narrow, distinctly convex in front; rostrum extending to the second pair of coxae, broad and angulated at base, its basal article centrally tumid; hind tibiae with about seven external strong spines: length of body 3 millimetres, including the tegmina 4 | millimetres. One example from Charles Island (C. Darwin). 8. JASSUS LUCIDUS, n. sp. Shining mustard-yellow; tegmina whitish, transparent ; wings white; head broad, exceedingly short from the vertex hindwards, convex in front, concave behind ; thorax transverse, much broader than long, very convex in front, less so behind; scutellum triangular ; tegmina extending considerably beyond the body, rather narrow, slightly convex in front; rostrum nearly as in preceding species, but narrow at base ; hind tibiae densely spined: length of body about 2| millimetres, including the tegmina about 3g. One example, James Island (C. Darwin). The specimen being somewhat damaged, I have been unable to take absolutely definite measurements. 9. JASSUS STRIOLARIS, n. sp. Head testaceous, above with a central and lateral longitudinal line and a spot on each side between them, black • frons with a central line and the ocelli black ; thorax black, with two central dots in front, and two U-shaped markings on the posterior half, testaceous ; scutellum testaceous; tegmina black, with longitudinal testaceous veinings ; body below black; legs testaceous: structure as in J. planus: length of body 3 millimetres, including the tegmina 4\ millimetres. Charles Island (C. Darwin). XI. ECHINODERMATA. By EDGAR SMITH. I. ECHINI. ]. CIDARIS THOUARSII, Val. 2. TOXOPNEUSTES SEMITUBERCULATUS, Val. |