P. iswaroides Male confusingly similar to Papilio helenus.

segment pointed, but obtuse; the harpe, which in helenus is twisted somewhat like a corkscrew, is placed in iswaroides before the middle of the anal clasper, is much narrower than in helenus and its free part is simply curved inwards away from the clasper, without being twisted half round.

Sumatra and Malacca, probably more widely distributed, but mistaken for helenus.

The discal stripes placed between the 8. radial and the 2. median on the under surface of the forewing only as long as the black marginal area is broad; the white area of the hindwing narrower than in the next form.

(21 c) flies all the year round in the mountains of Sumatra, where Dr. Martin’s collectors captured a rather large number.All the discal stripes of the forewing beneath at least twice as long as the black distal margin is broad; the 2.white patch of the hindwing about twice as long as its distance from the distal margin.