116 THE ENTOMOLOGIST. with that of the latter, Mr. Michael writes me : " Kiley was not an acaroiogist, and his descriptions and drawings of Acari cannot ever be relied on foi* small differences bet.ween closely allied species. "Xour specimens naturally had not any adnlt Hi/draclmcB on it, but so far as I could judge from Kiley's drawings and very imperfect descriptions of the larva, it seems to agree well in all its stages with your specimens. The water-mites, when parasitic, do not usually confine themselves to a single host, but are often found on several species ; and the geo-graphical distribution of Acari is usually very wide, often astonishingly so. Riley says that his species is particularly common on Zaitha fiu-minea (Say)" = Perthostoma aurantiaca, Leidy " {in litt. 29 Jan. 1901). G. W. K. MISCELLANEA RHYNOHOTALIA. By G. W. Kirkaldy, F.E.S. Fam. Miridce. AusTRocAPsus, gen. nov. Belonging to Capsaria, Reut., and allied to Hyalopeplus, Stal. Head subtriaugular, wider with eyes than the anterior margin of pronotum ; tylus broad, declivous ; interior margin of eyes sub-sinuately convex ; first segment of antennae stout, its length equalling that of the median line of the head from base of the head to base of tylus. Pronotum distinctly collared, the collar anteriorly straight, posteriorly somewhat deeply (comparatively) convex. Pronotum raised posteriorly, anteriorly callous on each side behind the collar, very rugose transversely, widely somewhat sinuately rounded posteriorly, lateral margins subsinuate. Scutellum transversely impressed near the base. Interior cell of membrane very large. The other characters are those of the division as signalized by Renter in the fifth volume of the * Hemiptera Gymnocerata Europae.' Type A. martigena, sp. nov, Head yellowish ; two thin median longitudinal lines from which • branch oft' obliquely six or seven lines on each side, first segment of antennae blood-red ; eyes dark blood-red. Pronotum and scutellum yellowish, very closely rugose and marked with blood-red. Elytra (including membranal nervures), abdomen above, and beneath, blood-red. Wings and membrane infuscate. Head beneath, sterna and femora yellowish with bright blood-red subparallel sinuate lines. Though the ground colour is really yellowish, it is so closely marked with blood-red that the general effect is that of the latter colour. The pubescence is scanty, and is pale golden yellow. Length 6^ mill. West Australia, Perth (my collection). * Now known as Belostoma fluminea. Say.
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