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Show 1891.] FROM SOUTH-WESTERN AFRICA. 89 arenaceous), but, while the fore-wing markings differ but slightly from those of natalensis, in the hind wing both the transverse bands are broken and irregular instead of straight and even, and the outer one, instead of being wholly separate, usually touches and often unites with the inner one, being strongly bent inward between the subcostal nervules. The basi-inner marginal orange of the underside in natalensis is wanting in homeyeri, but the subbasal spots in the hind wing are considerably or even greatly enlarged, the two outermost in the latter case often touching the inner transverse band (as in Dewitz's fig. 5 a). It is a remarkable fact that, of the ten examples collected by Mr. Eriksson, the six taken in August and September are without exception of very dull colouring beneath, contrasting strikingly with the bright tints of the four captured in November. In the latter the ground is a clear, or almost clear, pale yellow, and the markings orange-red or ferruginous-red and sharply defined; but in the former both ground and markings are much altered and approximate to each other in hue, especially in the hind wings, where an almost uniform isabelline-sandy tint prevails. This dulness and almost obliteration of the markings, except for their silvery streaks and spots, are most pronounced in the female, and, like several other instances recorded in this paper, appear to indicate a dry-season (winter) generation in which the underside colouring harmonizes with the exposed soil and withered herbage •*. Genus CHRYSORYCHIA, Wallengr. 71. C H R Y S O R Y C H I A H A R P A X (Fabr.). 2- Papilio harpax, Fabr. Syst. Ent., App. p. 829. n. 327-328 (1775). 8. Chrysorychia tjoane, Wallengr. K. Sv. Vet.-Akad. Handl. 1857, Lep. Rhop. Caffr. p. 44. Ehanda (August and September), Okavango River (December), and Omaramba-Oamatako (January). Five examples ; three males and two females. In all these specimens the underside colouring is pale and dull, and its metallic spots small and faint, while the male from Omaramba-Oamatako presents the peculiarity of a rather conspicuous dark-grey submarginal fascia in the hind wings. On the upper-side they have the ground-colour of a paler red, and the males have a narrower dark apical border, than more southern examples ; and in all respects they resemble the Zambesian and Matabele-land specimens mentioned in m y 'South-African Butterflies ' (ii. p. 164, note). One of the two Ehanda females agrees very closely with Hopffer's figure (Peters, Reise Mossamb.,Ins. pi. xxvi. f. 2) of a Querimba individual of the same sex. 1 Mr. de Mceville (Butt. India &c. iii. pp. 354,360, 364, 1890) gives evidence tending to show that occasional dimorphism occurs in several Asiatic species of Aphnceus. |