. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. of the Orthopterous Genus Cloeon. 147 great extent among individuals of the same kind, whether sub- imagos or imagos, and it is not much affected by drying. The interneural veinlets on the apical margin of the fore wings are disposed in pairs in the species with round-tipped hind wings, but singly in that with sharp-tipped wdngs. C. Rhodani, Pictet. In the c? the turban varies precisely as does that of C. diptera. The lines on the thorax also are si- milar to those in that ins
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. of the Orthopterous Genus Cloeon. 147 great extent among individuals of the same kind, whether sub- imagos or imagos, and it is not much affected by drying. The interneural veinlets on the apical margin of the fore wings are disposed in pairs in the species with round-tipped hind wings, but singly in that with sharp-tipped wdngs. C. Rhodani, Pictet. In the c? the turban varies precisely as does that of C. diptera. The lines on the thorax also are si- milar to those in that insect in highly coloured specimens. The anal setee are sometimes entirely white, generally white, with fuscous rings at the joinings and the middle Hind wing, maguitied. of the joints, seldom fuscous throughout, and become transpa- rent, through tenuity, towards their tips. The imago appears, in favourable weather, throughout the year. A branchial plate of the pupa is figured, I believe, in M. Pictet's work on the Ephemeridse. C. pumilum, Burmeister. Suhimago. (^. Turban yellow. Spots and lines of imago all indicated. Legs yellowish white; tarsi, tibise, and tips of femora tinged with fuscous. Thorax yellowish fawn-colour. Abdomen pale yellowish grey. Wings and setae unicolorous, fuscous. Penis black. Imago. Turban of male yellow, changing to red when dry. Thorax shiny yellowish' bx 11 • 1 11 J Hind wing, magnified. rown. Legs yellowisu, pale; knees and ° ^ tarsi darker in the female, but paler in the male. Abdomen in the male whitish yellow, the four apical segments brown: in the female dull yellow brown, with the tips of the dorsal arches darker. Setae in both sexes white, either annulated with fuscous or not. The hind margins are more delicate, much smaller and narrower than those of C. Rhodani, as will be seen on referring to the figures. C. hioculatum, L. Turban of male cornelian-red, seldom yellow. The imago varies but little in colour. It appears from April to November,
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