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.

EUCNEMIDAE

4 subfamilies, 8 tribes, 17 genera, 31 species

Subfamily Eucneminae

        Tribe Mesogenini

Stethon pectorosus LeConte, 1866: Otto and Karns (2017), Downie and Arnett (1996), BugGuide, MSU-ARC

Subfamily Macraulacinae

        Tribe Euryptychini

Euryptychus heterocerus (Say, 1839): Otto and Karns (2017), Downie and Arnett (1996)

        Tribe Macraulacini

Deltometopus amoenicornis (Say, 1839): Otto and Karns (2017), Hubbard and Schwarz (1878), Hatch (1924), Downie and Arnett (1996), MSU-ARC

??Dromaeolus badius (Melsheimer, 1845): CHAS:ENT as Fornax badius (Melsheimer); an uncommon sp., need to check ID

Dromaeolus cylindricollis (Say, 1839): Otto and Karns (2017), Hubbard and Schwarz (1878), MSU-ARC

Dromaeolus harringtoni Horn, 1886: Otto (2010), Downie and Arnett (1996), MSU-ARC

?Fornax bicolor (Melsheimer, 1845): Hubbard and Schwarz (1878); Mi record needs confirmation; known from WI & eastern U.S.

Isarthrus calceatus (Say, 1839): Otto and Karns (2017), Hubbard and Schwarz (1878), Hatch (1924), Downie and Arnett (1996)

Isarthrus rufipes (Melsheimer, 1844): Otto and Karns (2017), Downie and Arnett (1996)

Onichodon canadensis (Brown, 1940): Otto and Karns (2017), Downie and Arnett (1996), MSU-ARC

Onichodon downiei Muona, 2000: Otto and Karns (2017)

Onichodon orchesides (Newman, 1838): Otto (2013), Andrews (1923), Downie and Arnett (1996), MSU-ARC

Onichodon rugicollis (Fall, 1928): Otto and Karns (2017), BugGuide

Thambus horni Muona, 2000: Otto and Karns (2017)

        Tribe Nematodini

Nematodes atropos (Say, 1839): Ruesink and Parsons (2023), MSU-ARC

Nematodes penetrans (LeConte, 1852): Otto and Karns (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

Subfamily Melasinae

        Tribe Dirhagini

Dirrhagofarsus ernae Otto, Muona & McClarin, 2014: Otto and Karns (2017), Haack and Ruesink (2020), MSU-ARC

Entomophthalmus rufiolus (LeConte, 1866): Otto and Karns (2017), Downie and Arnett (1996), MSU-ARC

Microrhagus audax Horn, 1886: Otto (2015), Otto and Karns (2017)

Microrhagus carinicollis Otto, 2015: Otto and Karns (2017)

Microrhagus pectinatus LeConte, 1866: Otto (2015), Andrews (1923), Downie and Arnett (1996), MSU-ARC

Microrhagus subsinuatus LeConte, 1852: Otto (2015), MSU-ARC

Microrhagus triangularis (Say, 1823): Otto (2015), Hubbard and Schwarz (1878), MSU-ARC

Rhagomicrus humeralis (Say, 1839): Otto and Karns (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996)

Sarpedon scabrosus Bonvouloir, 1875: Otto and Karns (2017)

        Tribe Epiphanini

Epiphanis cornutus (Eschscholtz, 1829): Otto (2011), Downie and Arnett (1996), MSU-ARC

Hylis frontosus (Say, 1836): Otto and Karns (2017), Downie and Arnett (1996)

Hylis terminalis (LeConte, 1866): Otto and Karns (2017), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

        Tribe Melasini

Isorhipis obliqua (Say, 1839): Otto and Karns (2017), Schwarz (1876), Downie and Arnett (1996), MSU-ARC

Isorhipis ruficornis (Say, 1823): Otto and Karns (2017), Andrews (1923), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

Subfamily Pseudomeninae

        Tribe Schizophilini

                Schizophilus subrufus (Randall, 1838): Otto and Karns (2017)

This family list was last updated: November 7, 2022