Reference

Shôichi Francisco Sakagami, Andreas Werner Ebmer, Takeshi Matsumura, Yasuo Maeta (1982): Bionomics of the Halictine Bees in Northern-Japan. II. Lasioglossum (Evylaeus) sakagamii (Hymenoptera, Apoidea, Halictidae), with Taxonomic Notes on Allied Species. – Kontyu – 50(2): 198 - 211.