9th International Congress of Hymenopterists. Ehime University, Matsuyama, Japan, 23-27 July 2018. Arkady S. Lelej presents his talk at the Congress. 26 July 2018.

 
 
  Part of: Proshchalykin MYu, Gokhman VE (2021) Editorial. In: Proshchalykin MYu, Gokhman VE (Eds) Hymenoptera studies through space and time: A collection of papers dedicated to the 75th anniversary of Arkady S. Lelej. Journal of Hymenoptera Research 84: 1-9. https://doi.org/10.3897/jhr.84.72212