The Saroba group of genera
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Lopharthrum Hampson

Type species: comprimens Walker, Bangladesh.

The rather angular grey wings have diffuse and irregular brown fasciation as well as diagnostically irregular, reddish suffused, creamy patches distal to, and partially incorporating, postmedial rows of lunules. Three of these lunules are white in the forewing. The hindwing patch is larger and contains the darker zig-zag of the submarginal. The forewing is slightly bifalcate, resembling
Goniophila somewhat, but the hindwing margin is more irregular and angled most strongly at M3. The male antennae are ciliate. The labial palps are upcurved, with a very short third segment. The male hind-tibia is long, with a ventral crest of scales.

In the male abdomen, the eighth tergite is unmodified but the sternite has its anterior margin narrowly sclerotised and extended considerably on each side as slender sclerotised rods. Distally, the central portion supports a pair of pleated, deeply rugose, wing-like structures. In the genitalia, the uncus has a dense crest of hairs. The valves are largely divided into an apically bifid costal process and a paddle-shaped saccular to apical section. The juxta is a rhomboidal plate with an inverted, V-shaped ridge centrally. The aedeagus is slender, sinuous, with a small vesica that bears about five small cornuti.

In the female, the complex, folded ostium is broad and set within the posterior part of the eighth segment. It narrows abruptly into the first, straight, sclerotised section of the ductus that broadens again at its distal end into a robust spherical chamber that gives rise to the ductus seminalis. The spherical corpus bursae is beyond this after another constriction.

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