Sympistis semicollaris

{{Short description|Species of moth}}

{{Speciesbox

| image = Sympistis semicollaris 03.jpg

| image_caption =

| taxon = Sympistis semicollaris

| authority = Smith, 1909

| synonyms = *Oncocnemis semicollaris

}}

Sympistis semicollaris is a moth of the family Noctuidae first described by Smith in 1909.{{cite web |editor-last=Savela |editor-first=Markku |date=June 19, 2020 |url=https://ftp.funet.fi/pub/sci/bio/life/insecta/lepidoptera/ditrysia/noctuoidea/noctuidae/oncocnemidinae/sympistis/#semicollaris |title=Sympistis semicollaris (Smith, 1909) |website=Lepidoptera and Some Other Life Forms |access-date=January 11, 2021}} It is found in western North America in the vicinity of the Gulf of Georgia and east of the Cascades from south-central British Columbia to central Oregon.

The wingspan is about 31 mm.{{cite web |url=http://mothphotographersgroup.msstate.edu/species.php?hodges=10133 |title=931952.00 – 10133 – Sympistis semicollaris (Smith, 1909) |website=North American Moth Photographers Group |publisher=Mississippi State University |access-date=January 11, 2021}}