Superfamily Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Species fiscellaria (Hemlock Looper - Hodges#6888)
Other Common Names
Synonyms and other taxonomic changes
Lambdina fiscellaria (Guenée, )
Powell & Opler (2009) listed the forewing length 16-18 mm. (1)
coast to coast in Canada and adjacent parts of US
Larvae feed on hemlock, balsam fir, and white spruce, plus oak and other hardwoods.
The female lays her tiny eggs on a variety of substrate throughout the forest from August to October. After overwintering in this stage the eggs hatch from late May to mid-June. a
There are many online sources with information on the pest status of the species.
L. athasaria may cause similar damage on hemlock. It closely resembles L. fiscellaria in all of its life stages making identification between the two species very difficult. L. athasaria overwinters in the pupal stage. Damage by the larvae is later in the summer.
Powell, J.A. & P.A. Opler, 2009. Moths of Western North America. University of California Press, plate 30, fig. 15; p. 217. (1)
Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.