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

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

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

Previous events


Subspecies Megalopyge opercularis bissesa - Megalopyge bissesa

Flannel Moth Caterpillar - Megalopyge opercularis Flannel moth - Megalopyge opercularis Slugmoth - Megalopyge opercularis Megalopyge bissesa - Megalopyge opercularis - - Megalopyge opercularis - female Image showing more wing detail - - Megalopyge opercularis - female Megalopyge bissesa larva - Megalopyge opercularis Larva Day 75 - Megalopyge opercularis
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Zygaenoidea (Flannel, Slug Caterpillar, Leaf Skeletonizer Moths and kin)
Family Megalopygidae (Flannel Moths)
Genus Megalopyge
Species opercularis (Southern Flannel Moth - Hodges#4647)
Subspecies bissesa (Megalopyge bissesa)
Synonyms and other taxonomic changes
Megalopyge opercularis bissesa Dyar, 1911
4646 Megalopyge bissesa Dyar, 1911 is now recognized as a subspecies of 4647 Megalopyge opercularis Dyar, 1911 (Smith, 1797)
Dyar (1911) reported the wingspan as ♂ 30 mm., ♀ 45 mm.
Powell & Opler (2009) reported the forewing length as 14-25 mm. (1)
Megalopyge bissesa resembles typical M. opercularis but outer third of the hindwing and forewing are pale and lacks any markings.
Southern Arizona, southern Texas and Mexico. (1)
Powell & Opler (2009) reported adults during the months of July to September.(1)
April records from Texas. (2)
The known larval hosts include Quercus oblongifolia (Mexican blue oak) and Arctostaphylos sp. (manzanita).
Print References
Dyar, H.G., 1911. Descriptions of new species and genera of Lepidoptera from Mexico. Proceedings of the United States National Museum, 38: 267.
Powell, J. A. & P. A. Opler, 2009. Moths of Western North America. University of California Press. plate 20, fig. 24; p.165. (1)