Macaria lorquinaria is a medium sized, simply patterned Geometrid. Its forewing varies from yellowish brown to gray. The antemedial line is smoothly curved and a darker shade of the ground color with a pale medial border. The postmedial line is wavy and is also dark with a pale medial border. The forewings contain a small discal dash, and three subterminal spots, a pair of which are near the apex of the wing.
Lorquin’s Angle Moths fly in the mesic forests of our region from April to October, with a peak in July/August which may indicate they are bivoltine (2 broods). Their larvae feed on the leaves of alder, birches and willows, although there are also reports of them dining on Grand Fir and Douglas Fir needles. This moth is named after Pierre Lorquin (1797-1873), a French entomologist who collected extensively in the PNW, amongst many other places.
Size- FW length 12-14mm
Habitat- Mesic forests
Range- Region wide in appropriate habitat
Eats- Larva feed on leaves of alder, birch, and willows.
Flight Season- April to October, peak July-August