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.

TETRATOMIDAE

5 subfamilies, 2 tribes, 8 genera, 13 species

Subfamily Eustrophinae

Tribe Eustrophini

Eustrophopsis bicolor (Fabricius, 1798): Pollock (2012), Townsend (1886), Hatch (1924), Hubbard and Schwarz (1878), MSU-ARC

Eustrophopsis confinis (LeConte, 1866): Pollock (2012), Andrews (1923), Hubbard and Schwarz (1878), MSU-ARC

Eustrophus tomentosus Say, 1826: Pollock (2012), Leng (1920), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

Synstrophus repandus (Horn, 1888): Pollock (2012), Hatch (1924), MSU-ARC

Tribe Holostrophini

Holostrophus bifasciatus (Say, 1824): Pollock (2012), Hubbard and Schwarz (1878), MSU-ARC

Subfamily Hallomeninae

??Hallomenus debilis LeConte, 1866: Andrews (1923), Hubbard and Schwarz (1878); Andrews specimens in MSU collection IDed by him as this sp. are actually Anaspis rufa

Hallomenus scapularis Melsheimer, 1846: Andrews (1923), Hatch (1924), Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC

Hallomenus serricornis LeConte, 1877: LeConte (1878), Leng (1920), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC; described from Marquette material

Subfamily Penthinae

Penthe obliquata (Fabricius, 1801): Andrews (1923), Townsend (1886), Hatch (1924), Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC

Penthe pimelia (Fabricius, 1801): Andrews (1929), Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC

Subfamily Piseninae

Pisenus humeralis (Kirby, 1837): Andrews (1916), Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC

Subfamily Tetratominae

Tetratoma tessellata Melsheimer, 1844: Hubbard and Schwarz (1878), Ruesink and Parsons (2024), MSU-ARC

Tetratoma truncorum LeConte, 1866: Townsend (1886), Townsend (1889), Ruesink and Parsons (2024), MSU-ARC

The following species was also reported from Michigan, but we consider it to be adventive, a misidentification or other error:

Subfamily Hallomeninae

Hallomenus obscurus LeConte: Hubbard and Schwarz (1878); no such species name, apparently intended to write serricornis

This family list was last updated: March 10, 2023