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.
Higher classification within this family continues to evolve. BugGuide follows Węgrzynowicz (2002) by having only two subfamilies, Xenoscelinae and Erotylinae, with the latter divided into five tribes of which one is the former family Languriidae. Bouchard (2011) has the former Languriidae as its own subfamily.
EROTYLIDAE
2 subfamilies, 4 tribes, 11 genera, 28 species
Subfamily Erotylinae
Tribe Dacnini
Dacne quadrimaculata (Say, 1835): Boyle (1956), Andrews (1916), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tribe Encaustini
Megalodacne fasciata (Fabricius, 1777): Boyle (1956), Andrews (1916), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Megalodacne heros (Say, 1823): Boyle (1956), Andrews (1916), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tribe Languriini
Acropteroxys gracilis (Newman, 1838): Clampitt et al. (1996), Vaurie (1948), Hatch (1924), Hubbard and Schwarz (1878), MSU-ARC
Languria angustata (Palisot de Beauvois, 1811): Ruesink and Parsons (2022), BugGuide, MSU-ARC
Languria bicolor (Fabricius, 1798): Lawrence and Vaurie (1983), Vaurie (1948), Townsend (1889), Downie and Arnett (1996), MSU-ARC
Languria mozardi Latreille, 1807: Downie and Arnett (1996), Hubbard and Schwarz (1878), MSU-ARC
Languria trifasciata Say, 1823: Lawrence and Vaurie (1983), Vaurie (1948), Downie and Arnett (1996), MSU-ARC
Tribe Tritomini
Ischyrus quadripunctatus quadripunctatus (Olivier, 1791): Boyle (1956), Andrews (1916), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Pseudischyrus extricatus (Crotch, 1873): Downie and Arnett (1996), MSU-ARC; MSU has 1 MI specimen
Triplax dissimulator (Crotch, 1873): Boyle (1956), Downie and Arnett (1996), MSU-ARC
Triplax festiva Lacordaire, 1842: Boyle (1956), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Triplax flavicollis Lacordaire, 1842: Boyle (1956), Andrews (1916), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Triplax frontalis Horn, 1862: Boyle (1956), Leng (1920), Downie and Arnett (1996), Evans (2014), SI:NMNH
Triplax frosti Casey, 1924: Boyle (1956), Downie and Arnett (1996), MSU-ARC
Triplax macra LeConte, 1854: Boyle (1956), Hubbard and Schwarz (1878), Leng (1920), Downie and Arnett (1996), MSU-ARC
Triplax thoracica Say, 1825: Boyle (1956), Andrews (1923), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tritoma angulata Say, 1826: Boyle (1956), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tritoma biguttata biguttata (Say, 1825): Boyle (1956), Downie and Arnett (1996), MSU-ARC
Tritoma erythrocephala Lacordaire, 1842: Downie and Arnett (1996), MSU-ARC; MSU specimen IDed by P. Skelley
Tritoma humeralis Fabricius, 1801: Boyle (1956), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tritoma mimetica (Crotch, 1873): Boyle (1956), Downie and Arnett (1996), MSU-ARC
Tritoma pulchra Say, 1826: Boyle (1956), Andrews (1923), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tritoma sanguinipennis (Say, 1825): Boyle (1956), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Tritoma unicolor Say, 1826: Boyle (1956), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Subfamily Xenoscelinae
Cryptophilus propinquus Reitter, 1874: Esser (2017), MSU-ARC
Loberus impressus LeConte, 1863: Lawrence and Vaurie (1983), Hubbard and Schwarz (1878), Downie and Arnett (1996), MSU-ARC
Toramus pulchellus (LeConte, 1863): Ruesink and Parsons (2022), Hubbard and Schwarz (1878), MSU-ARC; 83 MI specimens in MSU collection
The following species was reported from Michigan, but we consider it to be a misidentification:
Subfamily Xenoscelinae
Cryptophilus integer (Heer, 1841): Andrews (1923); Esser (2017) concluded that two different species (C. propinquus & C. angustus) have gone under this name in North America, and that integer does not occur here. Andrews had this in the family Cryptophagidae.
This family list was last updated: November 7, 2022