17mm,
15mm. The male has bipectinate antennae as in umbrosa but the forewings
are green and black rather than brown and black, with clearer, rather zig-zag
fasciation, particularly in the marginal half. Like umbrosa, there are
darker transverse bands medially and between the postmedial and submarginal. In
the male genitalia the costal process of the valve is similar to that of
umbrosa but the aedeagus vesica has only two distal spines rather than a
cluster, though there is an additional more basal row and also a short series of
teeth at the junction with the aedeagus, features lacking in umbrosa.
15mm. The male has bipectinate antennae as in umbrosa but the forewings
are green and black rather than brown and black, with clearer, rather zig-zag
fasciation, particularly in the marginal half. Like umbrosa, there are
darker transverse bands medially and between the postmedial and submarginal. In
the male genitalia the costal process of the valve is similar to that of
umbrosa but the aedeagus vesica has only two distal spines rather than a
cluster, though there is an additional more basal row and also a short series of
teeth at the junction with the aedeagus, features lacking in umbrosa.