Ottawa (Dunrobin), ON Canada

30 June 2005   11:24PM EST  (left)
10 July 2005   9:50PM EST  (right)

Hyperstrotia pervertens is one of two species of Hyperstrotia known to occur in the Ottawa area (J.D. Lafontaine, pers. comm., 2001).

The forewing of Hyperstrotia pervertens is pale gray slightly tinged with brown, darker and browner towards the costa and palest near the inner margin.  The reniform spot is inconspicuous except for a black dot at the lower end.  The fine antemedial line is slightly darker than the ground color, preceded by a paler indistinct line along its basal edge.  The postmedial line is similarly fine, angling sharply outward around the reniform spot, and bounded on its outer edge by a paler line.  The subterminal line is defined mainly by a whitish shade or line along its outer edge.  In the median, there is a vague brownish band, with some darker scales where it appears to meet the pm line near the inner margin.  Covell (1984) indicates a wingspan from 1.7 to 1.9 cm for this species. 

According to Handfield (1999), the host plants for Hyperstrotia pervertens are American elm and bur oak. He indicates an adult flight season for my general area from about mid-June nearly to mid-August.

My records to date for Hyperstrotia pervertens (each date representing "the night of") are in the table below: