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Show 1891.] LYC.ENID.E OF THE SOLOMON ISLANDS. 363 The only difference I can detect in a good series of specimens is a slight one in the size of markings below. NACADUBA DION, Godt. Enc. Meth. ix. p. 655 (1823). Rubiana I. Ugi I. The four specimens before m e are females, and without seeing a male I think it better not to describe them as a new species. They seem to differ slightly from that sex of N. dion from N. Australia by having two large black spots with broad orange borders and metallic silvery-blue scales at the anal angle of hind wing below. NACADUBA VINCULA, sp. n. (Plate XXXI. fig. 18.) Male. Upperside dull light greyish blue, having a hairy appearance like C. platissa, Herr.-Schaff., very narrowly edged with black ; cilia greyish, darker at ends of nervules. Underside rich dark chocolate-brown, with darker white-bordered bands. Primaries with a band in the middle of the cell, commencing on the costa and reaching below the median nervure; a rather wider band at the end of the cell having a small lengthened spot on the costa immediately over it; beyond these a somewhat irregular semicircular macular band commencing on the costa, gradually widening to opposite the cell and reaching to the submedian nervure, where it is narrowest; the ground-colour outside the inner edge of this band suffused with white scales; a large marginal row of oval lunules with a faint grey line running through them. Secondaries blackish at the base; an irregular basal band and beyond this, commencing on the costa, another which may be said to end on the median nervure, beyond this another which commences on the subcostal and gradually narrowing reaches the anal margin about the end of the abdomen ; a submarginal row of triangular lunules and a marginal row of oval lunules encircled with white ; a large reddish-orange spot near the anal angle bordering inwardly a small black spot partly covered with metallic green scales. The outer margins of both wings very narrowly black; cilia as above. Head, thorax, palpi, and legs black ; antennae annulated with white. Abdomen brownish above, light buff below. Eyes densely hairy, with a pure white spot between them. Expanse If inch. Fauro I. I have only seen one specimen of this fine insect, which is allied toN. lineata, Murray, N . Australia, and N. palmyra, Feld. It may be distinguished from the male of N. lineata (which I have seen nowhere described) by its larger size, by the different colour, and prominent white borders to the bands below, and by the outer margin being rounded, not nearly straight as in that species. It is probable that the female will prove to have a broad white band on the primaries. I have examined the neuration of these species, and find that the first subcostal nervure is anastomosed with the costal nervure much as in typical Nacaduba. The following |