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



Species Malacosoma californica - Western Tent Caterpillar - Hodges#7702

912 Malacosoma californicum [T] - Western Tent Caterpillar Moth 7702 - Malacosoma californica - male moth - Malacosoma californica Western Tent Caterpillar - Malacosoma californica Western Tent Caterpillar Moth - Malacosoma californica Orange and grey caterpillar - Malacosoma californica Western Tent Caterpillar - Malacosoma californica Lasiocampidae - Malacosoma californica Lasiocampidae - Malacosoma californica
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Lasiocampoidea (Tent Caterpillar and Lappet Moths)
Family Lasiocampidae (Tent Caterpillar and Lappet Moths)
Subfamily Lasiocampinae
Tribe Lasiocampini
Genus Malacosoma
Species californica (Western Tent Caterpillar - Hodges#7702)
Hodges Number
Synonyms and other taxonomic changes
Malacosoma californica
Clisiocampa californica Packard, 1864
* phylogenetic sequence #224100
Explanation of Names
Malacosoma californicum (Packard, 1864)
Six species in the genus found in North America north of Mexico and several subspecies have been described.(1)
Forewing length 12-18 mm (Powell & Opler, 2009).(1)
Southeastern Canada to New York and west to the Pacific Coast. More abundant in the West (Powell & Opler, 2009).(1)
Choke cherry, Rosa, willow, wild plum, and Ribes(2)
Life Cycle
Egg mass on Red Alder (Alnus rubra) stem:

Eggs are laid in flattish, clasping masses on twigs and branches; they are covered with a light brown or grayish spumaline. The larvae construct tents similar to the eastern tent caterpillar.(2)
The gender of Malacosoma is neuter, so adjectivic species names ending -a are considered wrong spellings. (3)
Print References
Franclemont, J. G. 1973. The Moths of America North of Mexico, Fascicle 20.1. E.W. Classey Ltd. & R.B.D. Publications Inc.: p.78; pl.10.1-32. (4)
Miller, J. C. & P. C. Hammond 2003. Lepidoptera of the Pacific Northwest: caterpillars and adults. FHTET-03-11: 1-323. (5)
Packard, A. S. 1864. Synopsis of Bombycidae of the United States. Proc. Ent. Soc. Philadelphia 3: 386
Powell, J.A. & P.A. Opler 2009. Moths of Western North America. University of California Press, p.235, Pl.37.9(1)
Works Cited
1.Moths of Western North America
Powell and Opler. 2009. UC Press.
2.Eastern Forest Insects
Whiteford L. Baker. 1972. U.S. Department of Agriculture · Forest Service.
3.A revision of the genus Malacosoma (Hubner) in North America (Lepidoptera: Lasiocampidae): systematics, ...
Frederick W. Stehr; Edwin F.Cook . 1968. Bulletin of the United States National Museum, 276: 1-321.
4.The Moths of America North of Mexico. Fascicle 20.1. Mimallonoidea (Mimallonidae) and Bombycoidea.....
J. G. Franclemont. 1973. E.W. Classey Ltd. & R.B.D. Publications Inc.
5.Lepidoptera of the Pacific Northwest: Caterpillars and Adults
Miller & Hammond. 2003. USDA.
6.North American Moth Photographers Group
7.Pacific Northwest Moths