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Show 666 MR. H. H. DRUCE O N BORNEAN LYCENIDJ;. [June 16 than the others ; tail fine, brown tipped with white. Underside precisely as the male, but a little duller in colour. I have two males and two females before me, all from Kina Balu; they are nearest to A. alda, de Nicev., but can at once be recognized by their much larger size and very different upperside-the black margins being linear and blue, quite different in colour. I have two specimens of A. aula before me from Labuan, which are about half as small again as my species. ARHOPALA AIDA, de Nicev. Journ. Bombay Nat. Hist. Soc. vol. p. 168, pl. A. fig. 1 (1889). Two specimens from Labuan-a male like the type, and a female small and violet-coloured. ARHOPALA DIARDI, Hew. Cat. Lycaenid. B. M. p. 9, figs. 51, 52 (1862). Two ordinary specimens from Labuan and S.E. Borneo, from the collections of Dr. Staudinger and Herr Bibbe respectively. ARHOPALA MORPHINA, Dist. Panchala morphina, Distant, Ann. Mag. Nat. Hist. ser. 5, vol. xiv. p. 201 (1884). One specimen of this lovely insect, taken at Labuan, from Dr. Staudinger's collection. ARHOPALA BORNEEHSIS, sp. n., Bethune-Baker. (Plate XXX. fig- 5, 6 0 Borneo (Kina Balu, Tameang-Lajang) ; Malacca. Expanse, 6 42 to 46 millim. J . Upperside : both wings brilliant lustrous green, not so brassy as A. aurea, Hew., having in a side light a bluish tinge, with linear brown costa and outer margin to the primaries : secondaries with the green only occupying the central part of the wing, the rest of the wing being brown, this colour invading the outer margin of tbe green area, so as to make it irregularly hollowed ; the tail at the end of the lower median nervule is short. Underside : both wings dirty dull brown, all the markings being most indistinct, the pattern being slightly darker, with very faint pale edgings. Primaries with a trace of three increasing cell-spots, followed by an equally indistinct transverse band composed of five spots, the upper three being outwardly strongly oblique, the lower two inwardly oblique ; there is a trace of a spot below that closing the cell; subdisoal area dark ; submedian area pale. Secondaries with spots rather more distinct, four basal below each other, followed by three larger ones below each other ; cell closed by a largish spot, below which is a small one in the lower median angle, and above it, almost confluent but shifted very slightly outwards, are two spots above each other, the upper smaller one reaching to the costa: transverse band less distinct, composed of six spots from the upper discoidal nervure; the third |