Reference

Herbert Zettel, Toshko Ljubomirov, Florian M. Steiner, Birgit C. Schlick-Steiner, Giselher Grabenweger, Heinz Wiesbauer (2004): The European ant hunters Tracheliodes curvitarsus and T. varus (Hymenoptera: Crabronidae): taxonomy, species discrimination, distribution, and biology. – Myrmecological News = Myrmecologische Nachrichten006: 39 - 47.

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