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Species Parapediasia teterrellus - Bluegrass Webworm Moth - Hodges#5451

Crambid Snout Moth? - Parapediasia teterrellus Twig moth - Parapediasia teterrellus Bluegrass Webworm Moth - 5451 - Dorsal - Parapediasia teterrellus 6june2012-lep4 - Parapediasia teterrellus Bluegrass Webworm Moth   - Parapediasia teterrellus Bluegrass Webworm Moth - Hodges#5451 - Parapediasia teterrellus Moth - Parapediasia teterrellus Bluegrass Webworm Moth - Parapediasia teterrellus
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 Crambinae (Crambine Snout Moths)
Tribe Crambini
Genus Parapediasia
Species teterrellus (Bluegrass Webworm Moth - Hodges#5451)
Hodges Number
Other Common Names
Bluegrass Webworm (larva)
Bluegrass Sod Webworm Moth (adult)
Bluegrass Sod Webworm (larva)
Synonyms and other taxonomic changes
specific epithet also spelled "teterrella" by some sources, and misspelled "teterella" at some Internet sites
wingspan about 21 mm, based on photo by Jim Vargo at MPG
mature larva length 15-20 mm
Adult: mouthparts project foreward from head to form a snout; forewing variably pale brown to medium brownish-gray with jagged PM line, often having two large "teeth"; two dark gray or blackish streaks or blotches in medial area usually extend into the "teeth" of the PM line; ST line smooth and mostly straight, running parallel to outer margin for about two-thirds its length, then angling basally before reaching costa; terminal line dark, thin, edged proximally by several black dots; fringe pale brown; hindwing brownish-gray, more than twice as broad as forewing, with pale fringe

Larva: head dark gray; body greenish-gray with series of spots forming ring around each abdominal segment
Ontario and New England to Florida, west to California, north to Nebraska
lawns, golf courses, grassy areas in general; adults may be flushed from grass during the day but are crepuscular/nocturnal and attracted to light
adults fly from May to October (two broods)
larvae present from spring through fall (they overwinter)
larvae feed on bluegrass, tall fescue, and sometimes bermudagrass
Life Cycle
two generations per year; overwinters as a mature larva within silk-lined tunnel in soil or thatch; in late spring and again in mid-summer, females drop eggs randomly while flying low over grass; generation time is 4-10 weeks, depending on temperature
See Also
Black Grass-veneer (Neodactria caliginosella) forewing has toothed and jagged subterminal line, not smooth and straight (see images at MPG)
Graceful Grass-veneer (Parapediasia decorella) forewing is grayish-white with double ST line and less conspicuous dark shading in medial area (see images at MPG)
Internet References
live and pinned adult images by various photographers, plus common name reference [Bluegrass Webworm Moth] (Moth Photographers Group)
pinned adult images and collection site map (All-Leps)
live larva image plus habitat, behavior, biology, seasonality, feeding damage, control methods (Kansas State U.)
presence in Ontario; list (NHIC; Ontario Ministry of Natural Resources)
presence in Florida; list (John Heppner, Florida State Collection of Arthropods)
presence in Texas; list (James Gillaspy, U. of Texas)
presence in Arizona; list (Bruce Walsh, Moths of Southeastern Arizona)
presence in California; list (U. of California at Berkeley)
presence in Nebraska; list state record by Neil Dankert in August 1998; search on species "teterrella" (Lepidopterists Society Season Summary, U. of Florida)