A HONG KONG BUTTERFLY
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sides of the creature above the prolegs is yellow-ochre and there is a narrow border of the same colour around the head and the anal segment. The head is black. There are no processes as in the larva of Papilio agamemnon. By 9th July the smallest larva had grown from 9 mm to 15 mm retaining the same coloration. On 10th July it moulted on the surface of the leaf leaving the black skin. The length was constant at 15 mm. The larva was now apple green, darker on the back, with three narrow yellow stripes on the seventh to tenth segments, and a buff line just above the legs from head to tail. The head is celedon green with four circular black spots on the crown, and two more smaller ones at the angle of the jaws.
For observation the larvae were kept in a large glass container which, if covered, keeps the food plant fresher than the ordinary breeding cage. On opening this one morning the pungent scent emitted by the Papilionidae when disturbed was very noticeable, but no amount of interference would induce the larvae to extrude the osmeterium so that the colour could be ascertained.
The green stage of the larva only lasted four days, during which the faint yellow horizontal lines above the prolegs gradually faded out, and the apple green colour rather deepened. The full length attained was 26 mm on the eve of pupation. In all instances but one pupation took place on the underside of the leaf, and not the upperside as recorded by Corbet for L. meges. The pupa is attached by a white cremastral pad, and a very fine silk girdle which is almost invisible, holding the abdomen in contact with the leaf. The shape is very similar to the pupae of P. doson or P. sarpedon, being beaked, but the length is only 22 mm. The colour varied with the background, from yellow-green on young growth, to emerald on mature leaves. The exceptional larva spun up on the glass of the container in a vertical position, head up producing a lilac grey chrysalis. From the beak a seam runs diagonally to the base of the thorax, and another finer line marks the centre of the back for 5 mm when it bifurcates making a roughly elliptical figure to the tail. All pupation was during the hours of darkness. Emergence took place exactly seven days after pupation, but this is the hottest time of the year, the mean temperature being around 85°F. All imagines appeared between the hours of 8 a.m. and 9 a.m, standard time. Just before emergence the pupal case is