Ottawa (Dunrobin), ON Canada

3 June 2003   9:56PM EST  (top)
9 June 2004   10:01PM EST  (bottom)

Both the forewings and the hindwings of Horisme intestinata are largely covered with fine, gray-brown, parallel, crosswise lines, which are aligned at rest so that the moth somewhat resembles a smear of something on my brick wall.  The ground color of the wings is a pale yellowish brown or tan, slightly darker towards the outer margins.  The upper third of the forewing is less striped, with a plain area around the small discal dot.  The deep scallops of the postmedial line are quite evident when one takes a close look, but on a quick glance, the wing simply appears streaky.  In the subterminal area, there is a whitish scalloped line on both forewing and hindwing.  The darkest markings are the ends of a dark lines at the inner margins of the forewings, which are aligned with a dark line across the base of the abdomen to form a darker mark across the middle of the moth at rest.  Covell (1984) indicates a wingspan of 2.1 to 3.2 cm.

According to Handfield (1999), the host plant for Horisme intestinata in eastern Canada is said to be clematis. He indicates two generations per year for my general area, with adult flight seasons from late May to the beginning of July, and from early July to the end of August.

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