Birdantis decens Stål, 1863

Figs 3, 5

Birdantis decens Stål, 1863: 581 (described; compared with Neotropical genus Poiocera de Laporte, 1832), 582 (compared with B. delibuta Stål, 1863).

Birdantis decens – Walker 1870: 100 (listed). — Kirkaldy 1913: 11 (compared with a specimen tentatively attributed to B. delibuta). — Metcalf 1947: 92 (catalogued). — Lallemand 1959: 194 (keyed), 195 ( B. similis (Schmidt, 1911) possible junior synonym of B. decens (error!)); 1963: 10 (keyed). — Fennah 1977: 376 (keyed), figs 3–4 (male genitalia). — Nagai & Porion 1996: 14 (listed).

Diagnosis

This species can be separated from all other species of Birdantis by the following combination of characters:

(1) frons yellowish, with five longitudinal black lines not reaching ventral margin of frons, the three central ones merging together dorsally in a transverse line and central one dilated in middle (Fig. 5F)

(2) bulge between frons and vertex coloured as vertex (Fig. 5C)

(3) abdomen mostly black dorsally (Fig. 5A) and brown ventrally (Fig. 5B)

(4) tegmina opaque on basal half and hyaline on distal half (Fig. 5A)

(5) hind wings largely hyaline, with basal angle red (Fig. 5A)

Material examined

Holotype INDONESIA: ♂ (Fig. 5), Aru Island, 6°07′14″ S, 134°30′00″ E [Aru Isl / on the reverse: 58 48] [ Birdantis] [Type] [ Birdantis decens Stål] [BMNH(E), # 651892] (BMNH).

Distribution

Aru Island (Fig. 3).