During inspection of the Papilionid butterflies of the Nieuwenhuis collection in the Rijksmuseum van Natuurlijke Historie, Leiden, I found some new forms which are described below. Papilio toboroi straatmani ssp. nov. (pl. 1 figs. 1-2) Diagnosis. — Characterized by the large discal band on fore and hind wings, and by the presence of a yellowish discal band on the underside of the fore wings. Material examined. — Male (holotype), Solomon Islands, S. Isabel, Holibara, 750 m, 22.viii.1964, Straatman leg.; in coll. Nieuwenhuis (Rijksmuseum van Natuurlijke Historie, Leiden). Description of holotype. — Male, length of fore wing 56 mm. Head, thorax and abdomen black. Fore wing: ground colour matt black, on the upperside two greenish gray apical spots, the first being the larger. A complete discal band from the subcostal vein to the inner margin, transversally filling the distal part of the cell. On the underside a complete row of yellowish, conjoined spots, forming a band that is yellowish anteriorly, bluish posteriorly. Space 9 interspersed with yellowish scales. The cell has a transverse band from the subcostal vein to vein 5 and continuing to the inner margin. On the upperside of the hind wing a large discal band from the costa to the inner margin, passing at the level of the anastomosis of vein 7, entering into the cell and filling its outer third. The distal margin of the band appears as indented. There is a conspicuous, short, submarginal band situated between S2-S4, continuing to the yellow anal spot. On the underside the ground colour is yellowish with a discal row of cuneiform black spots, not conjoined, yellowish speckled posteriorly, well separated from the cell