Psilogramma menephron Cramer

Sphinx menephron Cramer, 1780, Uitl. Kapell . 3: 164.

Psilogramma menephron Cramer; Rothschild & Jordan, 1903: 42.

Diagnosis

See notes on Agrius convolvuli and Meganoton species.

Taxonomic Notes

Throughout much of the range of menephron both typical brown and ashy grey forms can be found.

Both are illustrated here.

The genitalia of the two forms show no detectable differences.

Diehl (1980) referred to the grey form as P. increta Walker and noted some differences in the larvae.

The taxon increta is typically Chinese and hence the name may not be applicable to Sundanian grey specimens even if they should prove to be distinct from menephron. More information is needed on the biology and larvae of the two forms throughout the range.

Geographical range

Widespread in the Indo-Australian tropics to Vanuatu and New Caledonia.

Habitat preference

The species is generally distributed, often common.

It may hill-top, being taken in numbers at 2600m on G. Kinabalu.

Biology

In Java (Dupont & Roepke, 1941) the larva is green or yellowish-green with brown spots and oblique white stripes.

There are transverse rows of small conical tubercles on the thoracic and anal segments.

The horn is almost straight green with white tubercles in the green form, and brown with yellowish tubercles in the yellowish form.

Bell & Scott (1937) show a green form where the stripes are bright green to a central line, white below it, grading away to the pale green ground, the white part being more or less confluent with a pale dorsal stripe: the thorax is uniform pale green.

A darker green form has brown blotches associated with the oblique stripes in the region of the spiracles, an extensive irregular brown area over T1 and a large brown triangle dorsally at the posterior that terminates in the brown dorsal horn.

A Hong Kong larva is shown in Pix.

Recorded host-plants (Bell & Scott, 1937; Dupont & Roepke, 1941; Browne, 1968; Moulds, 1981, 1984; Miyata, 1983; Bascombe, in litt.) are: Campsis, Clytostoma, Dolichandrone, Oroxylum, Pandorea, Podranea, Spathodea, Tecome (Bignoniaceae); Buxus (Buxaceae); Lonicera, Viburnum (Caprifoliaceae); Casuarina (Casuarinaceae); Pangium (Flacourtiaceae); Perilla (Labiatae); Melia (Meliaceae); Fraxinus, Jasminum, Ligustrum, Notelaea, Nyctanthes, Olea, Osmanthus, Syringa (Oleaceae); Sesamum (Pedaliaceae); Antirrhinum, Paulownia, Hebe (Scrophulariaceae); Callicarpa, Clerodendrum, Gmelina, Tectona, Vitex (Verbenaceae).