Fig. 1. _Papilio Thule_, male. The upper surfaces of two varieties or local forms of this species are figured. The right side represents the form found in New Guinea, the left side that obtained in Waigiou. It resembles _Danais sobrina_, Bd., which inhabits the same countries, and varies in a somewhat similar manner (see pages 20 and 63). Fig. 3. _Papilio Ænigma_, male, from Sumatra (see page 60). This species was named as above, from its puzzling resemblance to _Papilio Paradoxa_, which is found in the same districts. Both species appear to mimic _Euplœa Midamus_ (see page 20). Fig. 2. _Papilio Miletus_, male, from Celebes (see page 65). This species and the next exhibit in a striking manner the abruptly curved wing peculiar to Celebes. Figs. 5 and 6 represent species almost equally remarkable in this respect. Fig. 4. _Papilio Telephus_, male, from Celebes (see page 67). Fig. 5. _Papilio Androcles_, male, from Celebes (see page 63). Fig. 6. _Papilio Gigon_, female, from Celebes (see page 59). PLATE VIII. Illustrates, by comparative outlines of the anterior wings, the local modification of form in the Papilios of Celebes as compared with those of the surrounding islands. In each pair of outlines, the upper one represents a species peculiar to Celebes, while the one beneath it shows the most closely allied species or variety from any of the surrounding islands. (For details, see page 16.) The following are the names of the species:— Fig. 1. _Papilio Gigon_, from Celebes; _P. Demolion_, from Java. Fig. 2. _Papilio Macedon_, from Celebes; _P. Peranthus_, from Java. Fig. 3. _Papilio Androcles_, from Celebes; _P. Antiphates_, from Borneo. Fig. 4. _Papilio Telephus_, from Celebes; _P. Jason_, from Sumatra. Fig. 5. _Papilio Miletus_, from Celebes; _P. Sarpedon_, from Java. Fig. 6. _Papilio Agamemnon_, var., from Celebes; _P. Agamemnon_, var., from Sumatra. [Illustration: TRANS LINN SOC. VOL. XXV TAB 1 ] [Illustration: TRANS LINN SOC VOL XXV TAB 2. ] [Illustration: TRANS LINN SOC VOL XXV TAB. 3. J. O. Westwood, del. Day & Son, lith^{rs} to the Queen. ] [Illustration: TRANS LINN SOC VOL XXV TAB 4 ] [Illustration: TRANS LINN. SOC., VOL. XXV, TAB 5 J. O. Westwood, del. Vincent Brooks, Imp. ] PLATE VI. Represents four species not before figured, belonging to the most brilliantly coloured group of Eastern Papilios, and illustrating local modifications of form. N.B. The right side shows the upper surface, and the left side the under surface of the same insect. Fig. 1. _Papilio Pericles_, male, from Timor (see page 45).