Bug FAQMecyna mustelinalis
Mecyna mustelinalis · Order: Lepidoptera · Family: Crambidae
Mecyna mustelinalis has forewings that measure about 12.5 to 16.5 mm in length. Adults are on the wing from March through August, with most sightings in July.
Source: Wikipedia
Size
Forewing length ranges from 12.5 mm to 16.5 mm.
Source: Wikipedia
When you see it
Adults have been observed flying from March to August, most commonly in July.
Source: Wikipedia
Where it is found in the US
Recorded in 11 of 51 states and DC. Most records: California, Oregon, Montana, Wyoming, Colorado, Arizona, Nevada, New Mexico.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada; native in United States. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
When can I expect to see Mecyna mustelinalis?
Adults are active from March through August, with the highest numbers in July.
Source: Wikipedia
Same family (Crambidae)
Box Tree MothCydalima perspectalisDamages trees, gardens or crops
Celery Leaftier MothUdea rubigalis
Elegant Grass-veneerMicrocrambus elegans
Hawaiian Beet Webworm MothSpoladea recurvalisDamages trees, gardens or crops
Garden Grass-veneerChrysoteuchia culmellaDamages trees, gardens or crops
Bluegrass Webworm MothParapediasia teterrellusDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Mecyna_mustelinalis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.