Superfamily Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Species fiscellaria (Hemlock Looper - Hodges#6888)
Other Common Names
Arpenteuse de la Pruche - En français...Ilze V-G.
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 tiny eggs on a variety of substrates throughout the forest from August to October. After overwintering, 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)
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