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Show 1895.] ON THE ORTHOPTERA OF T H E SANDWICH ISLANDS. 891 under the impression that the variation observed was a sudden appearance of a character not otherwise met with in Flat-fishes ; but since the publication of the paper Professor W . C. Mcintosh has informed me that flat-fishes of some species in the ordinary course of development, while swimming on edge, go through a stage in which they are marked on both sides with a row of dorsal and ventral spots placed just as in my specimen. He has referred me to his paper in Proc. Roy. Inst. 1889, xii. p. 396, where examples of such larval fishes are figured. I am further indebted to Prof. Mcintosh for a specimen showing this condition, and similar specimens were also shown to me by Mr. E. W . L. Holt. M y case of variation is therefore an example of a persistence of larval coloration, and not of the appearance of a new character. It is consequently much less important than I imagined, though the comment respecting the similarity and simultaneity of the variation of the two borders still applies. 4. On the Orthoptera of the Sandwich Islands. By Herr BRUNNER V. WATTENWYL 1. [Received November 19, 1895.] The Orthopterological Fanna of the Sandwich Islands is little known, so that all collections made in them ought to produce novelties. Mr. Aug. de Bormans, in 1882, published descriptions of 17 species. The collection made by Mr. R. C. L. Perkins with much labour in 18c)4 contains examples of 23 species, which are only in part identical with those of the first collection. If we combine the results of these two explorations, we must confirm the conclusion already arrived at by Mr. de Bormans that this fauna is distinguished by its poverty, and notably by the absence of the Mantodea and Phasmodea. The Acridiodea are represented by only a single species. With the exception of some cosmopolitan species, the fauna is composed of species already known from the Australian Archipelago and of autochthonous species that are allied to the others. The genus Brachymetopa, represented by three or four species, is peculiar to the Hawaiian Archipelago. It is a member of the group Conocephalini. In the family Gryllodea the two new species of Paratrigonidium are remarkable. This genus, hitherto, has only been recorded from Asia. A new genus, Proynathogryllus, consists of two anomalous forms. Finally we meet with two species which evidently are recent importations. The first of these is Oxya velox, Fab., the unique representative of the Acridiodea, which is very common in the 1 Communicated by Dr. D. SHARP, F.Z.S., on behalf of the Committee for investigating the Fauna of the Sandwich Islands. |