Diduga Moore, [1887]

Zhao, Ting Ting & Han, Hui Lin, 2020, Four new species of the genus Diduga Moore, [1887] (Lepidoptera, Erebidae, Arctiinae) from China and Malaysia, ZooKeys 985, pp. 127-141 : 127

Genus Diduga Moore, [1887]

Diduga Moore, [1887]. The Lepidoptera of Ceylon 3 (4): 535. TS: Diduga costata Moore, [1887]. TL: Ceylon, [= Sri Lanka], Dickoya.

= Androstigma Hampson, 1893. Illustrations of typical specimens of Lepidoptera Heterocera in the collection of the British Museum 9: 13, 82. TS: Diduga albicosta Hampson, 1891. TL: India, Nilgiri Plateau.

Diagnosis.

Species of Diduga are small in size. The proboscis is fully developed, the labial palpus is slender, directed upwards over the top of the head; the male antennae vary from ciliated to bipectinated. The tibial spurs are long.

In the male abdomen, the 8th tergite is narrowed, with long and slender apodemes (Fig. 13 ); and the genitalia has narrow but long lateral hairpencils in many species. The configuration of valva may vary; usually they are simple, long, slender, and tapered, or short with several distinct processes, sometimes showing bilateral asymmetry. In the female genitalia, the ductus and corpus bursae range considerably in length.

Most species have brown forewings with white or yellowish margins along the costa and distally, or forewings are medium brown with darker fasciae and stigmata. There are often various hairpencils and androconial tufts on the wings of males. In addition, the forewings have a complete set of veins arising from the cell, R1 to R3 all extending to the costal margin, R4 and R5 have a common stem, the others are independent. In the hindwing, RS and M1 have a common stem, M2 is absent, the others are independent ( Fang 2000; Holloway 2001).

Figures

Figure 13. Abdomen of male adult of the genus Diduga.