Inner hind tibial spur of A Plastandrena, Andrena crataegi, and B Trachandrena, A. hippotes.
Part of: Sheffield CS (2020) A new species of Andrena (Trachandrena) from the Southwestern United States (Hymenoptera, Andrenidae). Journal of Hymenoptera Research 77: 87-103. https://doi.org/10.3897/jhr.77.53704