Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Halysidota harrisii - Sycamore Tussock Moth - Hodges#8204

WI080812 - 1 - Halysidota harrisii Sycamore Tussock Cat - Hodges#8204 - Halysidota harrisii Halysidota harrisii caterpillar - Halysidota harrisii Unknown Caterpillar - Halysidota harrisii Unknown Caterpillar - Halysidota harrisii Tussock moth caterpillar? - Halysidota harrisii Sycamore Tussock Moth Caterpillar ? - Halysidota harrisii pale yellow caterpillar - Halysidota harrisii
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Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Noctuoidea (Owlet Moths and kin)
Family Erebidae
Subfamily Arctiinae (Tiger and Lichen Moths)
Tribe Arctiini (Tiger Moths)
Subtribe Phaegopterina
Genus Halysidota
Species harrisii (Sycamore Tussock Moth - Hodges#8204)
Hodges Number
Synonyms and other taxonomic changes
Halysidota harrisii – Walsh, 1864
* phylogenetic sequence #930361
Explanation of Names
Author: Walsh, 1864.
Wingspan is about 50 mm.
adults in the eastern regions can only be separated from Halysidota tessellaris by genitalia dissection.(1) or brushing scales off males (see below)

Halysidota tessellaris and harrisii can be determined by brushing the scales off the terminal end of the abdomen.
limited to eastern North America(1)
Iowa and southern Wisconsin to New England, Fl and TX. See range of Platanus occidentalis (American sycamore).
larval host is Sycamore
Life Cycle
Overwinter as cocoons, adults emerge in May and June and lay eggs on the underside of leaves or bark of sycamore. Young larvae feed in groups, they scatter later.
Young larvae skeletonize leaves, older larvae eat everything except for the major veins.
Natural enemies control populations. Pesticides are used in some cases.
Print References
Powell, J. A., and P. A. Opler 2009. Moths of Western North America.(1)
Lafontaine J. D., and B. C. Schmidt 2010. Annotated check list of the Noctuoidea (Insecta, Lepidoptera) of North America North of Mexico. (2)
Internet References
Moth Photographers Group - range map, photos of larvae, living and pinned adults.
Works Cited
1.Moths of Western North America
Powell and Opler. 2009. UC Press.
2.Annotated check list of the Noctuoidea (Insecta, Lepidoptera) of North America north of Mexico.
Donald J. Lafontaine, B. Christian Schmidt. 2010. ZooKeys 40: 1–239 .