Bug FAQMerrick's Semioscopis
Semioscopis merriccella · Order: Lepidoptera · Family: Depressariidae
The forewings measure about 11 to 15 mm in length. Adults fly from mid-March through the end of May, and there is likely one generation each year.
Source: Wikipedia
Size
Forewing length ranges from 11 to 15 mm.
Source: Wikipedia
Life cycle
The species probably produces one generation per year.
Source: Wikipedia
When you see it
Adults are on the wing from mid-March until the end of May.
Source: Wikipedia
Where it is found in the US
Recorded in 23 of 51 states and DC. Most records: Michigan, Pennsylvania, Tennessee, New York, Massachusetts, New Hampshire, Connecticut, Virginia.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
When can I see adult Merrick's Semioscopis?
Adults are active from mid-March through the end of May.
Source: Wikipedia
Same family (Depressariidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Semioscopis_merriccella
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-28 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-28.