Triorbis aureovitta Hampson

Triorbis aureovitta Hampson, 1902, J. Bombay nat. Hist. Soc., 14: 209.

Diagnosis

The wings are rich brown, the forewings bisected over the basal half by a pale golden streak; their apex is also bisected by a diffuse, darker brown shade that extends from the distal end of the golden streak.

Taxonomic Note

A specimen of Triorbis aureovitta was included in analyses (Zahiri et al., in preparation) of a larger sample of taxa following that of Zahiri et al., (2011). It was placed within the pairing of Eligma with Selepa of that first analysis. All taxa of the Iscadia group discussed in Part 18 under Collomeninae are therefore transferred here to Eligminae. This arrangement departs from that of Lafontaine & Schmidt (2010), where Iscadia Walker is assigned to the Sarrothripini, but restores the Eligminae more to the original concept of Mell (1943) discussed in Part 18.

A further record of the larva of T. aureovitta from Garcinia (Guttiferae) has been made in Peninsular Malaysia (H.S. Barlow & S.K.L. Hok, pers. comm.). The larva is illustrated in Plate 11. The thoracic segments are swollen, and the rest of the body tapers gently to the anal segments. The primary setae are at least twice as long as the width of the body, perhaps up to three times the width in earlier instars. Those more dorsal setae of T2 and T3 are arranged in a row across the anterior part of the segment, their bases each set in a conspicuous black-white-black roundel; these roundels, when viewed from the front, may present a somewhat spider‐like ocellate ‘predatory’ threat to potential enemies. The thorax is broadly dull reddish orange in early instars, but this colour is reduced to a narrow strip anterior to the ocellar row on T3 in the final instar. Most of the body is leaf green except for the white line just above the spiracles and the black-white-black bars associated with the L1-2 setae on each abdominal segment, set just posterior to each spiracle.