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.

RIPIPHORIDAE

2 subfamilies, 3 tribes, 3 genera, 10 species

Subfamily Pelecotominae

Tribe Pelecotomini

Pelecotoma flavipes Melsheimer, 1846: Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC

Subfamily Ripiphorinae

Tribe Macrosiagonini

Macrosiagon acutipennis (Pierce, 1904): Pierce (1904), Leng (1920); original description included a Wolcott specimen from Grand Rapids, Michigan [name also written M. acutipenne]

Macrosiagon flavipennis (LeConte, 1866): Downie and Arnett (1996), MSU-ARC

Macrosiagon limbata (Fabricius, 1792): BugGuide, Ruesink and Parsons (2024), MSU-ARC

Macrosiagon pectinata (Fabricius, 1775): Townsend (1889)

Macrosiagon sayi (LeConte, 1858): Ruesink and Parsons (2024), MSU-ARC

Tribe Ripiphorini

Ripiphorus fasciatus (Say, 1824): Ruesink and Parsons (2024), MSU-ARC; considered to be a species complex; this genus badly needs serious study

Ripiphorus luteipennis (LeConte, 1865): Ruesink and Parsons (2024), MSU-ARC

??Ripiphorus stylopides (Newman, 1838): Hubbard and Schwarz (1878) as Myodites stylopides Newm. in the family Mordellidae; Downie and Arnett (1996) say "It is uncertain as to how this species is separated from the others."

Ripiphorus walshii (LeConte, 1865): Hubbard and Schwarz (1878), 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 Ripiphorinae

Tribe Macrosiagonini

Macrosiagon dimidiata (Fabricius, 1781): BugGuide; nr. Detroit Jul 2009 by Darrin O'Brien, probably M. flavipennis

This family list was last updated: February 24, 2023