Dufourea monardae (Viereck)

(Figs. 8, 9, 13–15)

Conohalictoides monardae Viereck, 1924: 14 (♀ ♂).

Halictoides Novae-angeliae (Robertson): Graenicher, 1910: 104 (misdet.)

Dufourea (Halictoides) monardae (Viereck): Michener, 1951: 1132 (catalog); Mitchell, 1960: 518 (♀ ♂ redescription); Krombein, 1967: 472 (catalog); Hurd, 1979: 1936 (catalog); Moure & Hurd, 1987: 21 (catalog).

Dufourea monardae (Viereck): Dumesh & Sheffield, 2012: 22 (♀ ♂ redescription).

This species is oligolectic on Monarda fistulosa L. ( Lamiaceae) (Bouseman, 1976).

Graenicher (1910) recorded this species (as Halictoides Novae-angeliae) on Agastache foeniculum Pursh (Kuntze) ( Lamiaceae), additional non- Monarda records include: Arctium minus Bernh. ( Asteraceae) and Leonurus cardiac L. ( Lamiaceae). Although the floral host is abundant, this species is relatively uncommon in collections. Nevertheless, D. monardae is the most commonly collected member of the genus in Michigan. The species is known to occur through parts of the Midwest, northeast and southeast USA, as well as Ontario, Canada (Mitchell, 1960; Bouseman, 1976; Wolf & Ascher, 2009; Dumesh & Sheffield, 2012).

Dufourea monardae has been collected in relative abundance at the Edwin S. George Reserve in Livingston County (Bouseman, 1976; Evans, 1986). Additional records of the species are from the following localities: Allegan Co.: Allegan State Forest, 30 July 1970 [MSUC]; Barry Co.: Yankee Springs Game Area, 13 July 1959 [MSUC]; Cass Co.: Edward Lowe Foundation, 22 July 2013 [MSUC]; Clinton Co.: Bath, 20 July 1963 [MSUC]; Rose Lake Wildlife Experiment Station, 14 August 1979 [MSUC]; Dickinson Co.: T 40 N R 30 Sec. 7, 31 July 1983 [BBSL]; Huron Co.: 5 km NE of Gagetown, 30 July 2009 [MSUC]; Ingham Co.: no locality, 17 August 1948 [MSUC]; East Lansing, 25 July 1960 [MSUC]; Mason, 1 August 2012 [MSUC]; Iona Co.: no locality, 14 July 1957; Kalamazoo Co.: Gull Lake Biological Station, 19 July 1965, 23 July 1960, 16 August 1960 [MSUC]; Kalamazoo, 18 August 1963 [MSUC]; Kalamazoo, 4 mi. W, 4 August 1963 [MSUC]; Livingston Co.: Gregory State Game Area, Sheets Lake, 26 July 1991 [BBSL]; Midland Co.: no locality, 17–27 July 1960 [MSUC]; Newaygo Co.: Croton, 4 August 1973 [MSUC]; Oakland Co.: Pontiac Recreation Area, 28 July 1972 [MSUC]; Shiawassee Co.: Rose Lake Research Area, 29 July 1993 [BBSL]; Washtenaw Co: Mud Lake Bog, 17–20 July 1971 [SEMC] (Fig. 24). The bee is evidently widespread in Michigan. The host plant, M. fistulosa, occurs throughout the state, having been record in 75 counties (Reznicek et al., 2011). Flight records range from July to late August (Evans, 1986).