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COLONEL V. R. BURKHARDT
The main points of Walker's report are that its location was the Happy Valley—now entirely built up—and that the plant on which the insect fed was Buddleia asiatica. Its flight resembled that of one of the Hesperiidae, and that it fed vibrating the wings all the time, with its long tails elevated and quivering. The earliest date he recorded it was on 15th February, 1892, and a fine series was taken on 12th March. In 1893 it was scarce, and did not appear before 2nd April.
Nothing is said about the larval stages, or the food plant, but Steven Corbet in his Butterflies of the Malay Peninsula, mentioning an allied species Leptocircus meges, states that its larva has been found in Hong Kong on Illigera cordata: in general appearance it is like a Papilio larva, being dark greenish-brown at first, and then changing to dark apple green. The pupa is attached to the upper surface of a leaf of the food plant.
Since 1950 very few collectors in Hong Kong appear to have captured Lamproptera curius and only two instances have been brought to my notice prior to 1957. Lt. Col. J. Eliot took one female near Sai Kung on 2nd May, 1953, and another was secured by the wife of a member of the University staff.
All butterflies have their cycles of abundance and scarcity, though their incidence has yet to be determined, and 1957 was evidently a peak year for Lamproptera curius. Two collectors, Messrs. R. A. U. Todd and J. Hackney, on 9th June, found the insect swarming in a gully in the centre of the New Territories. Their description of the flight, like dragonflies, tallies with the observations of Commander Walker. The insects were feeding on wild buddleia, and rested between flights with spread wings on fern. Abundant larvae were also noted, but were not taken as they were thought to belong to one of the commoner Papilionidae. On a later visit on 6th July Mr. Todd brought in seven larvae in various stages, with an ample supply of the food plant. This is Illigera platyandra (Dunn) a tough vine with triple pointed leaves growing at intervals of about four inches. The larvae ranged in length from 9 mm to the full fed at 26 mm, which pupated on the following day.
In the early stages the larva is black over the thorax narrowing above the prolegs, and broadening out again over the tail. The