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

Four Dineura species are now considered to occur in the West Palaearctic, including northern Europe, but D. parcivalvis has not been found in Scandinavia. Dineura pullior Schmidt Walter, 1995 is treated as a new junior subjective synonym of D.

The West Palaearctic Pseudodineura and Endophytus species (Hymenoptera, Tenthredinidae).

Six valid species of Pseudodineura are now recognised as occurring in the West Palaearctic, and the only described species of the related genus Endophytus. Larvae of all species are leaf-miners in Ranunculaceae. An identification key to adults is provided, followed by species commentaries which include summarised data on taxonomy, larval host plants, and distribution, with particular reference to Sweden.

A review of West Palaearctic Hoplocampa species, focussing on Sweden (Hymenoptera, Tenthredinidae).

Fourteen Hoplocampa species have been recorded in the West Palaearctic. We provide an illustrated key to these species, together with H. tadshikistanica, which is so far only known from Tadshikistan, but could occur in the West Palaearctic.

The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae).

Keys to adults and larvae of the genera of West Palaearctic nematine sawflies are presented. Species of some of the smaller genera are keyed, and their taxonomy, distribution, and host plants reviewed, with a geographic focus on north-western Europe, particularly Sweden. Lacourt, 2006 is a new junior subjective synonym of Latreille, 1810, resulting in the new combination (Lacourt, 2006) for the type species of .

An annotated catalogue of the types of Chrysididae (Hymenoptera) at the Swedish Museum of Natural History, Stockholm, with brief historical notes.

A critical and annotated catalogue of 72 types of Chrysididae (Hymenoptera) belonging to 53 species and subspecies housed in the Swedish Museum of Natural History is given. The lectotypes of Chrysisdiversa Dahlbom, 1845, Chrysissoror Dahlbom, 1854, Chrysurasulcata Dahlbom, 1845 and Holopygaamoenula Dahlbom, 1845 are designated. The previous lectotype of Chrysisdiversa Dahlbom, 1845 is set aside.

Venom gland and reservoir morphology in cynipoid wasps.

The venom apparatus morphology was examined in 25 species of Cynipoidea, representing 11 parasitoid taxa; 12 gall inducers and two inquilines. Typically the venom apparatus consists of an oval or bilobed reservoir connected to the ovipositor apparatus by a very short venom duct at the anterior end and to a single elongate unbranched venom gland at or near its posterior end. The Dufour's gland was not found in any of the examined species.