Megachile (Litomegachile) snowi Mitchell, 1927

Megachile mendica snowi Mitchell, 1927: 113 .

Megachile (Litomegachile) mendica snowi; Mitchell 1935a: 31. Butler 1965: 4. Scott et al. 2011: 55.

Megachile (Litomegachile) snowi; Bzdyk 2012: 55. Sheffield and Heron 2019: 70.

Diagnosis. The female of M. snowi can be identified by its mostly yellow to orange scopal setae on S6, white to golden appressed setae on T6, T6 straight (viewed laterally) (Fig. 7J), and 4-toothed mandibles with an angulate basal mandibular tooth, appearing as a weak additional tooth (i.e., 5-toothed) (Fig. 7D). The female of M. snowi is most similar to M. mendica (see M. mendica above). The male of M. snowi can be identified by its white apical setal band on T5 and by the apical margin of T6 (ventrad the transverse carina), which has submedian teeth that are either closer to each other than to the lateral teeth or all teeth are subequal to each other (Fig. 9E). Males of M. snowi are most similar to M. mendica (see M. mendica above).

Notes. This species is a new state record for Montana. Megachile snowi, a now-recognized species previously recognized as a subspecies of M. mendica, has only been collected from one locality in eastern Montana, a northern extension of its known range (Fig. 1 AF). Illustrations and a full morphological description can be found in Bzdyk (2012).