Some halictine bees from the Maritime Province of Siberia

Theodore D. A. Cockerell
1925 Proceedings of the United States National Museum  
The genus Halictus is world-wide, with an enormous number of species, many of which are very closely allied and hard to discriminate.
doi:10.5479/si.00963801.68-2607.1 fatcat:a2t5nxzjlrbdvgsco6loec4bxq