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 Loxostege cereralis - Alfalfa Webworm - Hodges#5017

Alfalfa Webworm - Loxostege cereralis Crambidae: Loxostege cereralis - Loxostege cereralis Crambidae: Loxostege cereralis - Loxostege cereralis ID Request - Loxostege cereralis Loxostege cereralis Moth ID request - Loxostege cereralis Loxostege cereralis Alfalfa Webworm - Loxostege cereralis
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 Pyraustinae
Tribe Pyraustini
Genus Loxostege
Species cereralis (Alfalfa Webworm - Hodges#5017)
Hodges Number
Synonyms and other taxonomic changes
Loxostege cereralis (Zeller, 1872)
Eurycreon cereralis Zeller, 1872
Wingspan 30-34 mm (1)
Adult: forewing whitish or pale gray with several longitudinal black and brown streaks; whitish or pale yellow patch in median area near costa; subterminal area yellow, shaped liked an almost-flat triangle; fringe dark brownish-gray; hindwing gray with darker shading along veins, fringe pale gray

Specimen identified by DNA analysis (BOLD). (2)

Larva: body yellowish to dark green with broad light-colored stripe down back, and darker stripe parallel to light stripe
Quebec and New York to Georgia, west to California, north to British Columbia. (3), (4), (5)
also occurs in Mexico.
fields, gardens, waste places
Adults are most common from March to October.
larvae feed on alfalfa and a variety of other crops and weed species
Life Cycle
overwinters as a larva or pupa; adults emerge in spring; 2-20 eggs are laid in overlapping groups on underside of leaves of hostplant
See Also
Beet Webworm Moth (Loxostege sticticalis) forewing is yellowish-brown without black longitudinal streaks, and hindwing has pale PM band.
Print References
Munroe, E., 1976. The Moths of America North of Mexico, Fascicle 13.2a. The Wedge Entomological Research Foundation. p. 77; pl. 4, figs. 6-12, 36. (6)
Powell, J.A., & P.A. Opler, 2009. Moths of Western North America. University of California Press. pl. 22, fig. 39; p. 175. (7)
Zeller, 1872. Verh. z.-b. Ver. Wien. 1: 517.
Internet References
pinned adult image and comment on distribution (James Adams, Dalton State College, Georgia)
live larva image plus biology and description of this and similar species (U. of California at Davis)
live adult images plus description and foodplants (Lynn Scott, Ontario)