New host records for Nearctic and Neotropical spider wasps (Hymenoptera: Pompilidae) Author Kurczewski, Frank E. 1188 Converse Drive NE Atlanta, GA 30324 Author West, Rick C. 6365 Willowpark Way Sooke, BC, Canada V 9 Z 1 L 9 Author Waichert, Cecilia Departamento de Zoología, Instituto de Ciências Biológicas, Universidade de Brasília Brasília, DF, 70910 - 900, Brazil text Insecta Mundi 2024 2024-03-01 2024 34 1 32 journal article 10.5281/zenodo.10793331 1942-1354 10793331 853E1294-B73D-43B8-8D82-AFD2E0B00352 Poecilopompilus costatus oenochrous (Schultz) ARGENTINA : Buenos Aires Province , Magdalena; 4 December 2022 , 3:06 PM ; M. Arregui. Host: Araneus lathyrinus (Holmberg) ( Araneidae ), adult or subadult female. The wasp stood on a leaf above ground level grasping the immobilized orb-weaver by the base of its left foreleg with her mandibles, retaining it in a perpendicular position ( Fig. 14 ; Arregui 2023 ). This is the first host record for Poecilopompilus costatus oenochrous , Araneus lathyrinus , which is the typical host spider family for most species in this genus ( Kurczewski et al. 2020 , 2022b ). ARGENTINA : Santa Fe Province , Nueve de Julio County; 3 March 2023 , 1703 PM ; I. M. Churruarin. Host: Ocrepeira venustula (Keyserling) ( Araneidae ), adult female. The wasp, clinging upside down to an upright narrow stem, held the orb-weaver cephalothorax upward, grasping the base of its left foreleg with her mandibles ( Churruarin 2023 ). Ocrepeira venustula (Keyserling) ( Araneidae ) is a new host genus and species for Poecilopompilus costatus oenochrous . This is the second host record for P. costatus oenochrous .