Genus Tachysphex Kohl, 1883 is placed into the family Crabronidae, tribe Larrini (Menke 1997) and includes approximately four hundred species from all over the world. They can be found in almost all terrestrial habitats, but occur mainly in semiarid areas. Species of Tachysphex prey on insects from the orders Blattoptera, Mantodea, Ensifera and Caelifera (Krombein & Pulawski 1994).

Actual species list find at:
http://researcharchive.calacademy.org/research/entomology/Entomology_Resources/Hymenoptera/

sphecidae/Genera_and_species_pdf/Tachysphex.pdf

Our interest about systematics of Tachysphex is directed to all Palearctic species. We prepre a review of European Tachysphex species including Turkey. Material for identification is invited!

Straka J. 2004: Tachysphex austriacus Kohl, restored from synonymy, and T. pompiliformis Panzer (Hymenoptera: Apoidea, Crabronidae), two sibling species. Linzer Biologische Beiträge 36: 1107-1114.

Straka J. 2005: A review of the genus Tachysphex (Hymenoptera: Apoidea) of Turkey, with descriptions of four new species. Acta Societatis Zoologicae Bohemicae 69: 247-276.

Straka J. 2008: Tachysphex stysi sp. nov. (Hymenoptera: Apoidea: Crabronidae) from Central Asia. Acta Entomologica Musei Nationalis Pragae 48: 691-696.