Indarbela Fletcher, 1922

Yakovlev, Roman V., Hulsbosch, Ramon, Ahmad, Jalil & Singh, Navneet, 2025, Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. XIII. Genus Indarbela Fletcher, 1922, Zootaxa 5661 (4), pp. 553-560 : 554

Genus Indarbela Fletcher, 1922

Fletcher 1922: 231.

Type species: Arbela tetraonis Moore, 1879 .

The replacement name for Arbela Moore, 1879 .

= Arbela Moore, 1879b: 411 .

Type species: Arbela tetraonis Moore, 1879 , by subsequent designation by Moore, [1883]: 155. A junior homonym of Arbela Stål, 1865 , Hemiptera Afr. 3: 42 – Insecta , Hemiptera .

= Lepidarbela Dalla Torre & Strand, 1923 : [3]. Unnecessary replacement name for Arbela Moore, 1879 .

Redescription. Male. Moths of medium size (length of forewing 9–13 mm). Antenna bipectinate, setae 4 times longer than antenna stem in diameter; antenna twice shorter than forewing. Forewing with pattern of transverse brown strokes of various widths on light brown or yellowish background, with expressed discal spot of medium size. In some specimens, brown stripes on the forewing almost fused. Hindwing brown, without pattern.

Male genitalia. Uncus long, slightly extending distally, apically with deep semicircular bifurcation, lobes of uncus wide, semicircular; gnathos arms of medium length, ribbon-like; scaphium and subscaphium fused into long spindle-like tube; valve short, wide, semicircular, with smooth edges, saccular edge (in basal half) strongly sclerotized, spoon-like; juxta of medium size, heart-like; saccus almost reduced; phallus twice shorter than valve, with greatly extended bilobed basal process, vesica aperture about 1/3 of phallus in length, vesica without cornuti.

Female. Moths of medium size (length of forewing 10–15 mm). Antenna bipectinate, setae twice longer than antenna stem in diameter; antenna three times shorter than forewing. Forewing with pattern of transverse brown strokes, partially fused into bands, background of fore wing light brown, with distinct small rounded discal spot. Hindwing light brown, with blurred rounded brown spots.

Female genitalia. Ovipositor short, papillae anales semicircular, anterior apophyses almost equal to posterior apophyses in length, short, thick; antrum funnel-shaped; ductus of medium length, sclerotized, bursa of medium size, rounded, without signa.

Diagnosis. The genus Indarbela clearly differs from the close genera (with the forked uncus) of the Oriental Metarbelidae in the following characters:

- the special pattern of stripes on the forewing,

- the poorly extended apex of the uncus,

- the specific spoon-like extension of the saccular edge of the valve,

- the well-structured bursa.

Composition: Monotypic genus.