The Eugoa Walker group of genera
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Holocraspedon Hampson

Type species nigropunctum Hampson, Sri Lanka.

Fig 7g: Holocraspedon nigropunctum Hampson

This genus has venation (Fig 7g) as in Philenora Rosenstock (type species undulosa Walker, Tasmania) which includes full complements of veins on both wings and stalking of pairs (R2, R3) and (R4, R5) on the forewing and (Rs, M1) on the hindwing. However, the facies and genitalic features are distinct. The forewing has a pattern similar to that of some Eugoa Walker, with dark brown delineation on paler brown or grey, but with two dark dots arranged longitudinally in the cell much more widely spaced than in that genus, and irregular dark brown patches of shading between the postmedial and the margin.

The male abdomen has a transverse zone of deciduous scales on the anterior of the eighth sternite that is marked by more prominent setal bases. The genitalia have the tegumen twice as deep as the vinculum. The valves have strong saccular and costal processes that flank the more membranous valve apex, but the costal process is short in the type species, the saccular one unequally bifid. The type species also has a calcar-like structure not seen in congeners and is the only species without cornuti in the aedeagus vesica. All other species have genitalia much as in the two Bornean ones.

The female genitalia have long apodemes and a bursa that is divided into a robust, densely spined corpus and a longer, more membranous appendix.

Apart from the type species and the three from Borneo below, the genus also includes parallelum Semper (Philippines), sordidior Rothschild comb. n. (New Guinea, Bismarcks), hypopolius Rothschild comb. n. (Dampier I., Bismarcks) and mediopuncta Rothschild comb. n. (Solomons).

In the original generic description, Hampson referred to the cocoon of the type species as transparent, incorporating larval hairs and strengthened by stronger transverse bands that cross in a figure-8. It was suspended beneath a leaf. A similar cocoon associated with a specimen from Buru attributed to sordidior was seen in NNM, Leiden. The strengthening bands were not obvious however; the cocoon was the shape and size of an orange pip.

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