Colletes aestivalis Patton 1879

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 : 68

Colletes aestivalis Patton 1879 ( aestivalis group) (New state record)

( Fig. 16A )

County records: Monroe, Wayne.

Notes. A male from Monroe Co. was identified by T.B. Mitchell, although he did not include Michigan in the species’ range in his 1960 revision. Stephen (1954) lists Carlinville, Illinois as the westernmost locality for C. aestivalis , whereas the closely related species C. andrewsi Cockerell occurs as far east as Wisconsin ( Wolf & Ascher, 2009). Both are oligolectic on Heuchera spp. ( Saxifragaceae ). Identification of the two specimens from southeast Michigan reported below as aestivalis was confirmed by JG based on the relative length of the hind basitarsus ( Stephen 1954) and reference to comparative material of that species from more eastern localities. There are very few recent records of C. aestivalis Patton and none from Michigan or, to our knowledge, from anywhere in the Northeastern United States. We therefore regard it as being of conservation concern.

Material examined. Monroe Co.: (no locality), 12 Jun. 1957, R & K. Dreisbach (1 ♂ MSUC) ; Wayne Co.: (no locality) 30 May 1959, R & K. Dreisbach, (1 ♂ MSUC) .

Figures

FIGURE 16. Colletidae faces from Michigan (not to scale). A) Colletes aestivalis Patton male. B) Hylaeus gaigei (Cockerell) holotype female. Photograph of H. gaigei provided with the permission of the National Museum of Natural History, Smithsonian Institution, 10 th and Constitution Ave. N. W., Washington, DC 20560 - 0193. (http: // www. nmnh. si. edu /).