Digonis Butler, 1882

Digonis Butler, 1882: 360; Bartlett-Calvert 1886: 333; Angulo and Casanueva 1981: 12; Scoble 1999: 229; Pitkin 2002: 248.

Type species.

Digonis aspersa Butler, 1882 . By original designation.

Diagnosis.

Digonis resembles Digonodes Warren, 1895, Gonogala Butler, 1882, and the newly proposed genus Phasmadigonis gen. nov. particularly due to the mucronate shape of the wings. However, it is distinguished from Digonodes by the presence of a mucronate outer margin on the M 3 of the hindwings and the presence of filiform (not bipectinate) antennae. It is recognized as distinct from Gonogala by the absence of bipectinate antennae and M 2 in the hindwings. It differs from Phasmadigonis by the presence of two accessory areoles in the forewings, R 2 arising from R 3 + 4, and the absence of a vein connecting Sc + R 1 to the discal cell in the hindwings. The monophyly of Digonis is supported by the following genital characters: a U-shaped gnathos with a plate or a pair of denticulate lobes, a concave, sclerotized process on the costa with an extended cucullus, a furca armed with spines, an aedeagus without cornuti, and a strongly denticulate annular signum.

Redescription.

Antennae serrate in males and filiform in females. Thorax and abdomen with brown to grayish scales. Forewings castaneous yellowish, gray, brown, or coppery; costal margin in the apical area slightly arched; outer margin concave between apex and M 3 vein. Wing venation (Fig. 1). Two accessory cells; Sc in contact with first accessory cell, R 1 originates near apex of second accessory cell, R 2 + 3 + 4 from apex of second accessory cell, R 3 and R 4 stalked, R 5 terminates at termen; M 2 equidistant between M 1 and M 3, M 3 slightly arched and ending in small mucronate apex; CuA 1 originates 1 / 10 before end of cell, CuA 2 originates near the midpoint of the cell. Hindwings paler than forewings, with multiple dark brown scattered spots; medial band conspicuous or faint; outer margin slightly mucronate. Sc + R 1 in contact with radial stem up to middle of cell, Rs originates 1 / 10 before end of cell, M 2 absent. Male genitalia with conical uncus; gnathos “ U ” shaped, with a pair of prominences or a denticulated plate; subrectangular valvae with a strong sclerotized and concave costal process; spiny furca; aedeagus unarmed. Female genitalia with subpyriform corpus bursae, annular and strongly denticulated signum.

Distribution.

This genus is distributed between latitudes 30 ° S and 47 ° S, spanning the provinces from Elqui to Capitán Prat in Chile.