View Image Gallery of Tribe Ophiusini

Trigonodes hyppasia Cramer
Noctua hyppasia Cramer, [1779] 1782, Uitlandsche Kapellen, 3: 99.
Phalaena deliana Stoll, 1790, Uitlandsche Kapellen, 5: 160.
Ophiusa anfractuosa Boisduval, 1833, Fauna entomologique de Madagascar, Bourbon et Maurice, Lep: 104.
Trigonodes acutata Guenée, 1852, Hist. Nat. Insectes, Spec. gén. Lépid. 7: 283.
Trigonodes exportata Guenée, 1852, Hist. Nat. Insectes, Spec. gén. Lépid. 7: 284.
Trigonodes inacuta Guenée, 1852, Hist. Nat. Insectes, Spec. gén. Lépid. 7: 284.
Trigonodes compar Walker, 1858, List Specimens lepid. Insects Colln Br. Mus., 14: 1451.
Trigonodes hyppasia Cramer; Holloway, 1976: 31; Kobes, 1985: 47.

Trigonodes hyppasia

Diagnosis. This and the next species have the centre of the forewing marked with two pale-edged blackish triangles that together form a triangle. In hyppasia, a smaller species, the more basal triangle is the larger, rather than vice versa, and there are darker markings in the much broader marginal grey-brown zone.

Geographical range. Old World tropics and subtropics east to Fiji and Tonga.

Habitat preference. Records are from disturbed forest and areas of secondary vegetation and cultivation from the coast to 1050m.

Biology. The larva was illustrated by Common (1990) and Miyahara (2001), and also described by Sevastopulo (1941a, 1942). The upper half is yellow, the ventral part browner. The yellow part is broken by longitudinal brown bands that become fainter towards the posterior, but intensify again beyond the prolegs, which are restricted to A5 and A6. Sevastopulo indicated that these bands are made up of lavender and purple-brown lines, but their colour and composition is variable. The body is slender.

Sevastopulo described the egg as spherical with ribs, olive green, speckled rusty red. The hatchlings are slender with yellowish brown heads and brownish green bodies. Intermediate instars are green with three lateral purple brown lines. The pupa is in a slight cocoon of white silk, spun amongst leaves.

The host plants recorded (Common, 1990; Miyahara, 2001; Robinson
et al., 2001) are mainly in the Gramineae (e.g. Chrysopogon, Eleusine) and the Leguminosae (e.g. Glycine, Indigofera, Kummerovia, Medicago, Phaseolus, Rhynchosia), but there is also a record of Nephelium (Sapindaceae; Kuroko & Lewvanich, 1993).

<<Back >>Forward <<Return to Content Page

Copyright © Southdene Sdn. Bhd. All rights reserved.