County records: Kalamazoo, Newaygo, Van Buren.
Notes. Megachile petulans is known from a few locations in the southern tier of counties. It has previously been recorded from the neighboring states of Indiana and Ohio (Mitchell 1962).
Material examined. Kalamazoo Co.: Gull Lake Bio. Sta. (KBS), 18 Jul. 1956 (1 ♂, Melilotus alba; 1 ♂, Monarda fistulosa), 1 Aug. 1956 (2 ♂) 11 Aug. 1969 (1 ♂), 14 Aug. 1964 (1 ♂), R.L. Fischer (MSUC); Newaygo Co.: (no locality) 15 Jul. 1950, R.R. Dreisbach (1 ♀ MSUC); Van Buren Co.: (no locality) 25 Jul. 1942, R.R. Dreisbach (1 ♀ MSUC).