Dichromia
indicatalis
Walker comb. n. Hypena indicatalis Walker, [1859] 1858, List Specimens lepid. Insects Colln Br. Mus., 16: 61.
Dichromia indicatalis
Figure 442Figure 443Figure 449
Diagnosis. The forewing has the postmedial variably oblique and triarcuate, the zone basal to it a richer darker brown, perhaps grading slightly paler in the basal half. The black exterior to the apical lens tends to be more intense and extensive distally when it is strongly developed. The cilia in the basal half of the male antennae are significantly shorter than the width of the flagellomeres. The male genitalia have valves that broaden gently to a rounded apex. The uncus is relatively shallowly curved. The aedeagus has some apical spining and a small patch in the vesica. In the female, the ductus is long and slender, arising from a shallow, pocket-like ostium, and is almost twice as long as the seventh segment. The corpus bursae is a little shorter, pyriform and generally lightly rugose, and contains a variable numbers of small, tongue-like processes centrally.
Taxonomic note. The male from Sarawak collected by Wallace and illustrated matches the holotype of indicatalis with the same provenance in having elongated, sagittate submarginal marks in the apical lens of the forewing. Both these specimens have genitalia (slides 20063 and 20623 respectively; Fig 443) that are significantly larger than in all other males dissected (e.g. Fig 442), including one each from Peninsular Malaysia and Hainan. The valves are broader basally and extend slightly more beyond a more extensive saccus in this typical pair. Probably two species are involved, but fresh collections from Borneo may be needed to resolve this. Poole (1989) provided a lengthy synonymy for indicatalis which included laesalis (see above) and four other taxa. H. cidarioides Moore and H. persimilis Hampson are true Hypena related to H. gonospilalis, and this may also apply to tortuosa Moore, but type material has not been examined. These species all have long antennal cilia in the male. The Japanese taxon caliginosa Wileman also appears to be another species but has not been dissected.
Geographical range. Indo-Australian tropics to Japan and Solomons.
Habitat preference. Only old material has been seen, from lowland localities such as Bidi in Sarawak or Tenom in Sabah, or from the vicinity of G. Kinabalu but without altitude data. The holotype was taken by A.R. Wallace in Sarawak, probably in the lowlands.
