Gnoriste macra Johannsen was described from Whitefish Bay, Wisconsin in 1912. The type locality is now a highly residential region a few miles north of the center of Milwaukee. Herein, collection events are reported for G. macra from Sauk County in southcentral Wisconsin. These new records, nearly a century after the only other literature record, indicate the species still thrives in Wisconsin though likely extirpated from the type locality. The specimens were recovered from unbaited Townes Malaise traps during mid- to late May, 2006 and 2020. Cranial anatomy and functional morphology of the head suggests G. macra may be a highly specialized pollinator and candidate plant species are hypothesized.
Young, Daniel K.
"Rediscovery of Gnoriste macra Johannsen in Wisconsin (Diptera: Mycetophilidae: Gnoristinae),"
The Great Lakes Entomologist, vol 54
Available at: https://scholar.valpo.edu/tgle/vol54/iss2/10