Bug FAQCisthene faustinula
Cisthene faustinula · Order: Lepidoptera · Family: Erebidae
No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
The forewings measure about 9 to 11 mm in length. It is found in California and adults are active from July through September.
Source: Wikipedia
Size
Forewing length ranges from 9 to 11 mm.
Source: Wikipedia
When you see it
Adults have been recorded on the wing from July to September.
Source: Wikipedia
Where it comes from
This species occurs in California.
Source: Wikipedia
Where it is found in the US
Recorded in 1 of 51 states and DC. Most records: California.
AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFL
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
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Source: GBIF
More photos
Same family (Erebidae)
Spongy MothLymantria disparDamages trees, gardens or crops
Fall Webworm MothHyphantria cuneaDamages trees, gardens or crops
Brown-tail MothEuproctis chrysorrhoeaCan irritate skin
Isabella Tiger MothPyrrharctia isabella
Virginian Tiger MothSpilosoma virginicaCan irritate skin
Salt Marsh MothEstigmene acreaDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Cisthene_faustinula
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.