Bug FAQBrown-shaded Mimorista
Mimorista subcostalis · Order: Lepidoptera · Family: Crambidae
The brown-shaded Mimorista has forewings 15.5 to 19.5 mm long. Adults fly from April through October. It occurs in North America, recorded in Arizona, California, Colorado, Nevada, Oklahoma and Texas.
Source: Wikipedia
Size
Forewing length ranges from 15.5 to 19.5 mm.
Source: Wikipedia
When you see it
Adults are on the wing from April to October.
Source: Wikipedia
Where it comes from
The species is found across North America, including Arizona, California, Colorado, Nevada, Oklahoma and Texas.
Source: Wikipedia
Where it is found in the US
Recorded in 6 of 51 states and DC. Most records: California, Texas, Arizona, Oklahoma, New Mexico, Oregon.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
When are brown-shaded Mimorista adults active?
Adults are on the wing from April through October.
Source: Wikipedia
How large are these moths?
Their forewings measure between 15.5 and 19.5 mm in length.
Source: Wikipedia
Where can I find this species?
It is distributed in North America and has been recorded in Arizona, California, Colorado, Nevada, Oklahoma and Texas.
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/Mimorista_subcostalis
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.