Nomada autumnalis Mitchell 1962

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 : 55

Nomada autumnalis Mitchell 1962 (ruficornis group)

(Michigan holotype; Fig. 12B )

Nomada (?Heminomada) autumnalis Mitchell, 1962: 382 .

Holotype. ♂ USA: Michigan: Oakland Co.: 23 Sep. 1923, A.W. Andrews ( NMNH: 75212).

County records: Montmorency, Oakland.

Notes. Species delimitation and identification of bees within the genus Nomada are notoriously challenging and the ruficornis group, which may be paraphyletic ( Alexander 1994) and includes the majority of eastern species ( Alexander & Schwarz 1994), is in need of revision. The taxonomy of this species, which is nominally endemic to Michigan, remains in doubt.

Figures

FIGURE 12. Michigan holotype material at the National Museum of Natural History, Smithisonian Institution (not to scale). A) Triepeolus michiganensis Mitchell, dorsal habitus. B) Nomada (Xanthidium) autumnalis Mitchell, dorsal habitus. C) Nomada dreisbachi Mitchell, dorsal habiuts. D). Nomada sobrina Mitchell, dorsal habitus. Photographs 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 /).