The Filigree butterfly (Cethosia biblis), also known under the synonym Papilio biblis as well as under the name Bortefalter, belongs to the genus Cethosia within the family of the noble butterflies (Nymphalidae). In English, the filigree butterfly is called red lacewing. The filigran butterfly has a wingspan of about 8.0 to 9.0 centimetres. The forewings are toothed on the upper side and coloured black. The front edge has a dirty olive brown tinge. A broad white bandage runs across the middle of the outer rim. There are also some weak white spots along the black edge of the outer edge. Next to these, a series of narrow angled white markings can be seen. The hind wings are deeply toothed and white. A white hem is also visible along the outer edge here a series of angled white markings is also visible, as are on the overlying wings and above each wing there is a series of short white stripes parallel to the edge of the wing. Above these are six round black spots, one between each nerve cell. On the white parts of the wings there are six other smaller spots, some very distinct and some very faint. On the lower side the forewings are coloured red. The red colour extends from the base to almost half of the wings and towards the rear edge the red colour changes to a creamy colour.
On this red ground some short black and blue lines are visible. The outer edge has a black edge where angular arrow-shaped white markings are clearly visible. Above this border, near the outer angle, there are two oval black patches or eyes whose iris appears white and between them and on the black edge there is a series of small, round, black patches lying close to each other. The white bandage on the upper side is also visible on the lower side. Several other black spots of different shapes appear in different places, in particular a group is distributed in the middle of the wing. The lower wing is white in colour and has pale cream clouds. But at the base again white, blue, red and black stripes appear and at the front edge these are rather blue and brown coloured. The outer angle of the front edge also shows angular white patches, which are more arrow-shaped or dot-shaped. Two small, curved black lines meet at the abdomen to form an arch. A series of small black spots is visible over the black edge of the wing and six larger spots of different shapes and sizes are distributed over them.