[1]
Engel, M.S. and Michez, D. 2020. A new vernal species of Hesperapis from the lower Midwestern United States (Hymenoptera: Melittidae).
Journal of Melittology
. 98 (Dec. 2020), 1–11. DOI:
https://doi.org/10.17161/jom.i98.14816
.