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 Rothschildia forbesi - Forbes' Silkmoth - Hodges#7761

Rothschildia Lebeau Forbesi (Forbes' Silkmoth) - mating pair (male on right) - Rothschildia forbesi - male - female Forbes' Silkmoth caterpillars - Rothschildia forbesi Forbes' Silkmoth  - Rothschildia forbesi Finally a Forbes! moved inside - Rothschildia forbesi SANWR Rothschildia cocoon - Rothschildia forbesi Rothschildia forbesi? - Rothschildia forbesi Rothschildia forbesi cocoon? - Rothschildia forbesi caterpillar - Rothschildia forbesi
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Bombycoidea (Silkworm, Sphinx, and Royal Moths)
Family Saturniidae (Giant Silkworm and Royal Moths)
Subfamily Saturniinae (Silkmoths)
Tribe Attacini
Genus Rothschildia
Species forbesi (Forbes' Silkmoth - Hodges#7761)
Hodges Number
Other Common Names
In Spanish: "Cuatro Espejos" (four mirrors)
Synonyms and other taxonomic changes
Rothschildia lebeau forbesi (1)
Wingspan 10-12.5 cm
Very large silk moth found only in South Texas.
Transparent triangular spots on the wings. Wings reddish brown to dark brown with olive tinge.
Fairly common in the lower Rio Grande Valley, especially around Brownsville, Texas. Ranges south into Mexico. (2)
February-April, September-November (two flights in Texas)
Life Cycle
Larvae feed on several trees/shrubs, such as Ash, Fraxinus, prickly ash, Zanthoxylum, and willow, Salix.

Adults may take two or three years before emerging from the pupa. (2)
Two other species in this genus rarely enter into SE Texas: Jorulla silkmoth (R. jorulla) and Orizaba silkmoth (R. orizaba)

R. cincta was recorded from the Brownsville area ca. 1900. (2)

NOTE: Records for Rothschildia jorulla/cincta in se. TX are based on the same taxon (i.e. listed as R. jorulla cincta)
Print References
Tuskes, pp. 187-188, plates 24--adult, 5-larva (1)
Internet References
Moth Photographers Group - species page with photographs of living and pinned adults.
Works Cited
1.The Wild Silk Moths of North America: A Natural History of the Saturniidae of the United States and Canada
Paul M. Tuskes, James P. Tuttle, Michael M. Collins. 1996. Cornell University Press.
2.Illustrated Checklist of the Lepidoptera of the Lower Rio Grande Valley, Texas, Vol. 2B: Macro-Moths
Ed Knudson & Charles Bordelon. 2004. Texas Lepidoptera Survey, Houston. xiv + 59 pp. 20 plates.
3.Peterson Field Guides: Eastern Moths
Charles V. Covell. 1984. Houghton Mifflin Company.