Underside similar to P. demolion; but with the same differences in the band, on both wings, as on the upper-side, and on the hind-wing the discal black patches between the veins are shorter.Western Ghats and hills of southern India.

[1][2] The IUCN Red Data Book records the Malabar banded swallowtail as uncommon and not threatened as a species.

However a survey in the early 1990s by Harish Gaonkar showed the butterfly to be rare but distributed from Kerala to Goa.

[5][6] Generally found in the semi-evergreen and evergreen tropical forests of the Western Ghats where it flies mainly during the monsoon months.

Recorded in Kodagu (Coorg) as having broods from September to October, November to December, and, from April to May.

The life-history of this insect is given by Messrs. Davidson and Aitken: One of these gentlemen watched a female, P. liomedon, laying its eggs on a tender shoot of a small jungle tree or shrub (Acronychia laurifolia).

Of the caterpillars which emerged five days after the eggs were laid, "five passed successfully through all dangers and became beautiful specimens, one female and four males.

At first the larvae were of an oily yellow colour and bore many pairs of spiny points, but these disappeared with age and after the last moult there were only the short fleshy processes on the 2nd and last segment which characterise the group, and one additional curved pair on the ninth segment."

"The colour after the last moult was a clear slaty-blue, changing eventually to a greenish tint, with light brown markings very much the same as those which characterise the rest of the group.