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Species Ancylosis undulatella - Sugarbeet Crown Borer Moth - Hodges#5918

Hulstia undulatella - Ancylosis undulatella Pyralidae: Hulstia undulatella - Ancylosis undulatella Phycitini - Ancylosis undulatella Sugarbeet Crown Borer Moth  - Ancylosis undulatella Sugarbeet Crown Borer Moth - Ancylosis undulatella Sugarbeet Crown Borer Moth - Ancylosis undulatella Pyralidae: Ancylosis undulatella - Ancylosis undulatella Sugarbeet Crown Borer Moth? - Ancylosis undulatella
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 Pyralidae (Pyralid Moths)
Subfamily Phycitinae
Tribe Phycitini
Genus Ancylosis
Species undulatella (Sugarbeet Crown Borer Moth - Hodges#5918)
Hodges Number
Other Common Names
Sugarbeet Crown Borer (larva)
Synonyms and other taxonomic changes
First described by [James] Brackenridge Clemens in 1860 as Nephopteryx undulatella
wingspan 16-18 mm
Forewing narrow, light brown to grayish-brown with reddish-brown to black band in basal area above AM line; AM line zizag with two large points; PM line jagged with several small points; AM and PM lines not parallel, pale, outlined in black; median area unmarked except for two black dots near center; dark shading beyond PM line does not reach outer margin hindwing more than twice as broad as forewing, grayish-brown, with darker shading toward outer margin; fringe whitish or pale gray
Ontario and Michigan to Florida, west to California, north to Oregon and Idaho wherever sugarbeets are grown
commercial fields of sugarbeets; adults are attracted to light
adults fly from spring to fall
larvae feed on leaves, leafstems, and crowns of sugarbeets
Life Cycle
two generations per year; overwinters as a pupa in the soil; adults emerge in spring and lay eggs around sugarbeet crowns or on leaves and leafstems
The larvae are considered a minor pest of sugarbeets, and usually cause minor damage.
Internet References
pinned adult image by Jim Vargo (Moth Photographers Group)
pinned adult image by John Glaser (courtesy of Dalton State College, Georgia)
live larva and adult images plus common name reference and other info (U. of Idaho)
common name reference (
classification in subfamily Phycitinae, and synonym history (FUNET)
presence in Florida; list (Michael Thomas, Florida State Collection of Arthropods)
presence in California; list (U. of California at Berkeley)
presence in Utah; list (Utah Lepidopterists' Society)
presence in Michigan; PDF doc - list of Michigan Microlepidoptera (Michigan Entomological Society, U. of Michigan)
presence in Ontario; list (NHIC; Ontario Ministry of Natural Resources)
Original species description in Proceedings of the Academy of Natural Sciences of Philadelphia, p.205 (unedited OCR of scanned book)