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Pseudocollix Warren

Type species: hyperythra Hampson.

Inoue et al. (1982) treated this genus as distinct from Horisme (type species tersata Denis & Schiffermüller, Europe): the Bornean species listed under Horisme by Holloway (1976) are to be found either in this genus, in Collix Guenée or in Papuarisme Gen. n.

The fasciation on the light brown wings is similar to that of Horisme, but genitalic features indicate the two are not closely related. Both have, in the male, a reduced uncus and prominent labides as in the Eupitheciini, but the saccus is longer, the valve more deeply divided into costal and saccular processes (the latter bilaterally asymmetric) in Pseudocollix.

The male abdomen indicates a relationship with Collix, with reduction of the sclerites of the last two segments, paired coremata between them and between segment 8 and the genitalia, and a central apodeme on segment 6. However, the pronounced, curved labides and bilaterally asymmetric divided valves of the male and funnel-like ductus of the female are diagnostic.

In the bursa copulatrix Horisme has the distal bulb coarsely scobinate and there are one or more bands of spines in the basal neck. In Pseudocollix the ductus broadens out, funnel-like to an ostium as wide as the eighth segment, narrowing distally to a short, convolute, strongly sclerotised zone at the base of the bursa. The distal part is ovate, with a narrow longitudinal band of spines similar to that seen in some Collix Guenée species.

Probably many of the taxa currently assigned to Horisme in the Indo-Australian tropics will prove best placed in other genera. The widespread Australasian H. xylinata Warren (Robinson, 1975; Holloway, 1979) has genitalic characters more or less consistent with placement in Horisme, however. The limits of Pseudocollix are therefore unclear, but possibly predominantly Oriental.

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