New records of the genus Diodontus Curtis, 1834 (Hymenoptera: Crabronidae) from Bulgaria, Montenegro and Poland, with a key to Central and Eastern European species Author Olszewski, Piotr Author Ljubomirov, Toshko Author Wiśniowski, Bogdan Author Kowalczyk, Jan Krzysztof Author Krzyżyński, Maciej text Zootaxa 2016 4061 2 164 172 journal article 51224 10.11646/zootaxa.4061.2.6 75e33810-9f91-4f02-b602-f5843bc75736 1175-5326 261549 B202DA1E-DFE7-4868-A5B6-DE70651AB2F3 Diodontus insidiosus Spooner, 1938 ( Figs 1, 8 , 27, 29, 31 ) First record from Poland . Małopolska Upland: Pińczowskie Mts. ( 50°28’29”N , 20°24’1”E ) 24 VII 2006— 1 ♂ leg. B. Wiśniowski. The specimen was collected on the flower head of Senecio jacobea at the edge of xerothermic grassland. In Spain , the species was collected on flowers of Seseli tortuosum and Euphorbia serrata , also on the leaves of Populus nigra and Quercus ilex ( Gayubo & Sanza 1986 ) . The species prefers open, dry and sandy habitats ( Macek et al. 2010 ). The species range includes mainly North and Central Europe ( Lomholdt 1984 ). It is known from Austria , Belgium , Bulgaria , Czech Republic , Finland , France , Germany , Great Britain , Greece , Hungary , Italy , Luxembourg , Netherlands , Portugal , Russia , Slovakia , Spain and Switzerland ( Pulawski 2015 ). The species is morphologically similar to D. minutus which is one of the commonest species in Europe. Checking specimens of D. minutus in various entomological collections may reveal new records of D. insidiosus and bring new information about the occurrence of the species in the region.