Introduction. The name of each listed species is followed by up to five sources that report the species as occurring in Michigan. Sources in all upper-case letters refer to specific insect collections: MSU-ARC refers to material held by the Michigan State University Arthropod Research Collection (data provided by G. Parsons). All others refer to collection data extracted from the Symbiota Collections of Arthropods Network (SCAN) database online at https://scan-bugs.org/. See the Methods page for a list of abbreviations and associated collections.

Species names preceded by a single '?' are considered probable (for occurring in Michigan) but uncertain records. Those preceded by '??' are considered possible but unlikely to occur in Michigan. Species that are fully accepted as having valid Michigan records are unmarked. Species reported in the literature that we consider to be erroneous Michigan records are in a separate list following the others.

ELMIDAE

1 subfamily, 3 tribes, 6 genera, 21 species

Subfamily Elminae

Tribe Ancyronychini

Ancyronyx variegatus (Germar, 1824): Brown (1983b), Bright (2015), Hubbard and Schwarz (1878), MSU-ARC

Tribe Elmini

Dubiraphia bivittata (LeConte, 1852): Haack and Ruesink (2020), Bright (2015), MSU-ARC

Dubiraphia minima Hilsenhoff, 1973: Bright (2015), OMNH:RINVRT

Dubiraphia quadrinotata (Say, 1825): Bright (2015), Hubbard and Schwarz (1878), FMNH:FMNHINS

Dubiraphia vittata (Melsheimer, 1844): Brown (1983b), Bright (2015), Downie and Arnett (1996), MSU-ARC

Microcylloepus pusillus (LeConte, 1852): Snitgen (1996), Downie and Arnett (1996), FMNH:FMNHINS

Optioservus fastiditus (LeConte), 1850: Brown (1983b), Bright (2015), Downie and Arnett (1996), MSU-ARC

??Optioservus ovalis (LeConte, 1863): FMNH:FMNHINS; Lake Co., MI may be a bit W of its range

Optioservus trivittatus (Brown, 1930): Brown (1983b), Bright (2015), FMNH:FMNHINS

Stenelmis cheryl Brown, 1987: Ruesink and Parsons (2023), MSU-ARC; used to go under the name S. bicarinata

??Stenelmis concinna Sanderson, 1938: FMNH:FMNHINS; Barry Co., prob. should not be this far west

Stenelmis crenata (Say, 1824): Sanderson (1938), Brown (1983b), Bright (2015), MSU-ARC

??Stenelmis decorata Sanderson, 1938: Bright (2015); MI seems a little north of its expected range

Stenelmis douglasensis Sanderson, 1938: Sanderson (1938), Brown (1983b), Bright (2015), Downie and Arnett (1996), MSU-ARC

Stenelmis lignicola Schmude & Brown, 1992: Schmude et al. (1992), Bright (2015), Downie and Arnett (1996), MSU-ARC

Stenelmis mera Sanderson, 1938: Bright (2015), Evans (2014)

??Stenelmis musgravei Sanderson, 1938: Bright (2015); MI seems a little north of its expected range, can only be separated from S. quadrimaculata by male genitalia

Stenelmis quadrimaculata Horn, 1870: Sanderson (1938), Brown (1983b), Bright (2015), Downie and Arnett (1996), MSU-ARC

Stenelmis sandersoni Musgrave, 1940: Bright (2015), MSU-ARC

Stenelmis sexlineata Sanderson, 1938: Bright (2015), MSU-ARC

Tribe Macronychini

Macronychus glabratus Say, 1825: Brown (1983b), Townsend (1889), Bright (2015), Downie and Arnett (1996), MSU-ARC

The following species were reported from Michigan, but we consider them to be adventive, misidentifications or other errors:

Subfamily Elminae

Tribe Elmini

Stenelmis bicarinata LeConte, 1852: Bright (2015), Hubbard and Schwarz (1878), as Elmis bicarinatus Lec. in H&S; should not be as far north as MI, old records probably refer to S. cheryl

Stenelmis grossa Sanderson, 1938: Bright (2015); a s US sp., should not be in MI

This family list was last updated: November 6, 2022