Bombus (Pyrobombus) ternarius Say 1837 (lapponicus group)

= Bombus ternarius var. expallidus Cockerell 1916: 9 . (Michigan holotype; Fig. 7D)

Holotype. ♀ USA: Michigan: Schoolcraft Co.: Floodwood, 20 Jul. 1915, F.M. Gaige (NMNH: 40085).

County records: Alcona, Alger, Alpena, Arenac, Baraga, Benzie, Charlevoix, Cheboygan, Chippewa, Crawford, Delta, Dickinson, Emmet, Gladwin, Gogebic, Grand Traverse, Gratiot, Houghton, Huron, Ingham, Iosco, Iron, Kalkaska, Kent, Keweenaw, Leelanau, Luce, Mackinac, Marquette, Mason, Mecosta, Menominee, Midland, Missaukee, Montcalm, Montmorency, Oakland, Oceana, Ogemaw, Ontonagon, Oscoda, Otsego, Presque Isle, Roscommon, Saginaw, Schoolcraft, Shiawassee, Van Buren, Wayne, Wexford.

Notes. The holotype of B. t. expallidus differs from most B. ternarius in having metasomal terga 2 and 3 entirely yellow (Cockerell 1916; Williams et al. 2014). Bumble bees routinely vary in color due to both genetic variation and wear, and it is not currently recognized as a valid taxon.