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


Species Dicymolomia opuntialis - Hodges#4891

Another Moth - Dicymolomia opuntialis Another Moth - Dicymolomia opuntialis Another Moth - Dicymolomia opuntialis Small day-flying moth - Dicymolomia opuntialis Day-flying moth on cactus - Dicymolomia opuntialis 4891  - Dicymolomia opuntialis 4891  - Dicymolomia opuntialis Dicymolomia metaliferalis vs D. opuntialis - Dicymolomia opuntialis
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Pyraloidea (Pyralid and Crambid Snout Moths)
Family Crambidae (Crambid Snout Moths)
Subfamily Glaphyriinae
Genus Dicymolomia
Species opuntialis (Dicymolomia opuntialis - Hodges#4891)
Hodges Number
Synonyms and other taxonomic changes
Dicymolomia opuntialis Dyar, 1908
Explanation of Names
Specific epithet is for the host plant Opuntia.
There are six named species of Dicymolomia in America north of Mexico. (1), (2)
Wingspan about 13 mm.
The original description is available online in the print references below.
California. (3)
Holotype collected in San Diego, California.
Moth Photographers Group - large map with some distribution data.
Adults are most common from May through September. (1)
The larval host plant is Opuntia sp. (prickly pear cactus). (4)
Life Cycle
The larva form mines in the joints of the cactus pads. (5)
See Also
On Dicymolomia opuntialis (below), the outer half of the FW is more uniformly grizzled gray with little internal pattern or just a small black spot; on metalliferalis, this area is more mottled orange, white, and black. There is a fairly conspicuous median white line across the FW on metalliferalis, absent on opuntialis, and the subterminal white crescent on the FW of opuntialis only extends about 1/2 along the outer margin, whereas this same white subterminal line on metalliferalis covers about 7/8 of the outer margin. These features are more easily seen in lateral views than in top views of the moth.

(Left, opuntialis; Right, metalliferalis)
Compare on the pinned plates of Moth Photographers Group.
Print References
Dyar, H.G. 1908. Descriptions of eleven new North American Pyralidae, with notes on a few others. Proceedings of the Entomological Society of Washington, 10: 113.
Powell, J.A. & P.A. Opler 2009. Moths of Western North America,pl. 22.11, p. 172. (4)
Works Cited
1.North American Moth Photographers Group
2.Check list of the Lepidoptera of America north of Mexico.
Hodges, et al. (editors). 1983. E. W. Classey, London. 284 pp.
3.Essig Museum of Entomology, California Moth Species List
4.Moths of Western North America
Powell and Opler. 2009. UC Press.
5.The principal cactus insects of the United States.
Hunter et al. 1912. USDA Bureau of Entomology Bulletin. 71 pp.
6.BOLD: The Barcode of Life Data Systems