Biodiversity of the aculeate wasps (Hymenoptera: Aculeata) of the Arabian Peninsula: Vespoidea, Sapygidae

Stenarella domator (Poda) [Hymenoptera: Ichneumonidae], a newly introduced species to the Nearctic, and a summary of adventive Nearctic species of Ichneumonidae

Redescription of Anastatus mantoidae Motschulsky, the type species of Anastatus Motschulsky 1859, and Anastatus echidna (Motschulsky), the type species of Cacotropia Motschulsky 1863, with respect to taxonomy of Anastatus (Hymenoptera: Eupelmidae: Eupelminae)

Systematic revision of the North American velvet ant genus Invreiella Suárez (Hymenoptera: Mutillidae) with description of eleven new species

Transfer of two South American ant species from Tapinoma Foerster 1850 to Forelius Emery 1888 (Hymenoptera: Formicidae: Dolichoderinae)

A new species of genus Endasys Förster (Ichneumonidae, Cryptinae) parasitizing Pristiphora (Tenthredinidae) and a key to species from China

Biodiversity of the aculeate wasps (Hymenoptera: Aculeata) of the Arabian Peninsula: Vespoidea, Scoliidae

The Xiphydria annulitibia group in northeastern Asia (Hymenoptera, Xiphydriidae)

Taxonomic revision and cladistic analysis of the species of Zethus mexicanus group (Linnaeus, 1758) sensu Bohart & Stange, 1965 (Hymenoptera, Vespidae, Eumeninae)

Notes on the genus Netelia, subgenus Parabates (Ichneumonidae, Tryphoninae), with description of a new species from Oriental Region

Biodiversity of the aculeate wasps (Hymenoptera: Aculeata) of the Arabian Peninsula: Apoidea (Spheciformes), Sphecidae (sensu stricto)

Biodiversity of the aculeate wasps (Hymenoptera: Aculeata) of the Arabian Peninsula: Vespoidea, Bradynobaenidae

The genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Northwest Vietnam, with description of a new species

A taxonomic review of the genus Diolcogaster Ashmead (Hymenoptera, Braconidae, Microgastrinae) in Iran, distribution and morphological variability

A dryinid wasp in Early Eocene amber from the Paris basin (Hymenoptera: Dryinidae)

Taxonomic notes and Corrigendum for the manuscript entitled “Ichneumonid wasps of the subfamily Mesochorinae (Hymenoptera: Ichneumonidae): new replacement names, combinations and an updated key to the World genera” ARAUJO et al. (2018), Zootaxa, 4521: 052–060.

Revision of the Siobla metallica group (Hymenoptera: Tenthredinidae)

Revision of the Traumatomutilla americana species group (Hymenoptera: Mutillidae)

Discovery of the genus Kudakrumia Krombein, 1979 (Hymenoptera: Mutillidae) in India and description of a new species

New records of eumenine wasps (Hymenoptera: Vespidae: Eumeninae) from Russia with description of a new species of Leptochilus de Saussure, 1853

New species of Grotea Cresson (Hymenoptera: Ichneumonidae: Labeninae) from Brazil and Suriname

The first Ichneumonid fossil from the Early Pleistocene of Madeira Island (Portugal)

The West Palaearctic Dineura species, focussing on Sweden (Hymenoptera, Tenthredinidae)

Catalogue of parasitoids and inquilines in galls of Aylacini, Diplolepidini and Pediaspidini  (Hym., Cynipidae) in the West Palaearctic

The male gonostylus of the orchid bee genus Euglossa (Apidae: Euglossini)