Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Discussion, insects and people from the 2018 BugGuide Gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Species Halysidota harrisii - Sycamore Tussock Moth - Hodges#8204

mostly white caterpillar - Halysidota harrisii moth? - Halysidota harrisii Sycamore Tussock - Halysidota harrisii Sycamore Tussock Moth (Halysidota harrisii) larva - Halysidota harrisii Sycamore Tussock Moth - Halysidota harrisii Bug 20 - Halysidota harrisii Caterpillar ID help, please - Halysidota harrisii Creepy looking bug - Halysidota harrisii
Show images of: caterpillars · adults · both
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)
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 .