Monstruncusarctia Dubatolov et Haynes, 2008

Dubatolov & Haynes, 2008: 356–357. Type species: Alpenus aurantiaca Holland, 1893 (Fig. 3).

Diagnosis. The genus is characterized by an apically bifurcate uncus (sometimes with additional lateral processes), a curiously armed and sclerotized cucullus apex and a less sclerotized sacculus apex covered with chaetae. Аdditionally, male antennae bipectinate; eyes large, hemispheral, naked; fore tibiae simple, not robust, middle tibiae with an apical pair, hind tibiae with two pairs of spurs; vein R2 of forewings is stalked with R3+5 (venation type C, by Sotavalta 1964).

Remarks. The genus was also isolated from Spilosoma s. lat. (Dubatolov & Haynes 2008); originally, it was consisted of two not so closely related species with different wing pattern but a similar male genitalia structure. M. aurantiaca have additional lateral processes at the uncus apex, the wing pattern consisting of narrow brown bands on the background of speckled light brown wings; the tegulae lack dark spots. On the other hand, M. decemmaculata (Rothschild, 1916) (see: Goodger & Watson, 1995: 31, fig. 32, 41, fig. 139–140; Dubatolov & Haynes 2008) has spotted tegulae, light wings with a rounded discal spot and one or two rounded postdiscal spots. Because of the quite different wing pattern, it is excluded from the review.