Dieunomia (Dieunomia) heteropoda heteropoda (Say 1824)

Gibbs, Jason, Ascher, John S., Rightmyer, Molly G. & Isaacs, Rufus, 2017, The bees of Michigan (Hymenoptera: Apoidea: Anthophila), with notes on distribution, taxonomy, pollination, and natural history, Zootaxa 4352 (1), pp. 1-160 : 97

Dieunomia (Dieunomia) heteropoda heteropoda (Say 1824)

County records: Allegan, Berrien, Kalamazoo, Ottawa, Van Buren.

Notes. Dieunomia heteropoda was recently documented from the southwestern portion of the state based on specimens collected since 2003 ( Gibbs et al. 2014). These records are near the northeastern edge of its range. Although the large size and dark color of this bee makes it easy to recognize, the earliest known record in the state is only from 2003, suggesting that there has been a genuine range expansion. However, Montgomery (1957) recorded it from Starke County in northwest Indiana. Dieunomia heteropoda can be collected on large Asteraceae , such as Helianthus , Coreopsis , Rudbeckia and Centaurea . Females have also been observed collecting nectar from Polygonum (Polygonaceae) . Nests and mating behavior have been described from western states ( Cane 1991; Cross & Bohart 1960; Wcislo 1993; Wcislo & Buchmann 1995).

Material examined. Allegan Co.: 4.5 km south of Pullman, 17 Jul. 2013 (MSUC: RI), 15 Aug. 2013, J. Gibbs (1 ♀ JBWM), 11 Jul. 2014 (2 ♀ JBWM); Allegan State Game Area, T2N R14W Sec. 18, 2 Aug. 2003 (1 ♀ MSUC); Berrien Co.: 4 km west of Berrien Springs (1 ♀ MSUC: RI); Kalamazoo Co.: Oshtemo Twp., N41.172, W85.345, 13 Jul. 2011, D.A. Landis (1 ♂ MSUC: RI); Ottawa Co.: Grand River Park, 27 Jul. 2008 (1 sex not recorded MVWC); Van Buren Co.: 4 km NNW of Almena, 18 Jul. 2011 Coreopsis (1 ♂), 20 Jul. 2011 (1 ♀), 8 Aug. 2011 Helianthus (1 ♀ 1 ♂), 10 Jul. 2012 Rudbeckia (5 ♀ 1 ♂) (MSUC: RI), 4 km NNW of Almena, 14 Aug. 2014, J. Gibbs (1 ♀ JBWM).