Dufourea marginata (Cresson)

(Figs. 19–21)

Panurgus marginatus Cresson, 1878: 62 (♀).

Panurgus autumnalis Robertson, 1895: 121 (♀).

Dufourea (Halictoides) marginata (Cresson): Mitchell, 1960: 516 (♀ ♂ redescription).

Dufourea (Halictoides) marginata marginata (Cresson): Michener, 1951: 1132 (catalog); Hurd, 1979: 1936 (catalog); Moure & Hurd, 1987: 20 (catalog).

Dufourea marginata (Cresson): Dumesh & Sheffield, 2012: 18 (♀ ♂ redescription [in part]).

There are no records of this species in Michigan. Dufourea marginata occurs in Illinois, Wisconsin, and Ontario (Michener, 1951; Wolf & Ascher, 2009; Dumesh & Sheffield, 2012), and so could plausibly extend its range into both the southwest corner and the Upper Peninsula of Michigan. Dufourea marginata is a specialist on Helianthus L. (Stephen et al., 1969; Hurd et al., 1980), but has also been collected on other Asteraceae, including Bidens aristosa (Michx.) Britton, Cirsium altissimum (L.) Hill, Erigeron speciosus (Lindl.) DC. var. macranthus (Nutt.) Cronquist, Grindelia squarrosa (Pursh) Dunal, Oligoneuron rigidum (L.) Small, and Rudbeckia hirta L. (Stephen et al., 1969; Hurd, 1979; Hurd et al., 1980; Moure & Hurd, 1987). Dufourea marginata has also been recorded visiting Convolvulus L. ( Convolvulaceae) for nectar.