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The genus Misetus Wesmael, 1845 is a small taxon of the subfamily Ichneumoninae, tribe Phaeogenini. The genus can be distinguished from other genera of the tribe by having mandible with two teeth, clypeus with more or less developed median apical tooth, genae short and sublinearly narrowed behind eyes in dorsal view; males are characterized by thyridia large and placed far off the base of metasomal tergite II; females are easily recognized by metasoma elongate and compressed apically, apical margin of last metasomal tergite more or less concave and ovipositor short and bent upwards (Selfa & Diller 1994, 1995, Di Giovanni et al. 2018). Misetus includes seven known species, six of which occur in Europe (Wesmael 1845, Kusigemati 1974, Kolarov 1985, Selfa & Diller 1995, Di Giovanni et al. 2018) and one in Japan and South Korea (Kwon et al. 2011; Yu et al. 2012). Misetus strumiai Di Giovanni, Scaramozzino & Diller, 2018 was described recently from females known only from the island of Montecristo (Italy, Tuscany) (Di Giovanni et al. 2018, Di Giovanni & Scaramozzino 2019). Here we described the male of this species and provide a comparative diagnosis with other known males of European members of the genus.

Archaeocercus schuvachinae, gen. et sp. nov., is described and illustrated based on a female specimen from Rovno amber (Ukraine). This fossil genus is characterized by the apical position of cerci on metasoma, absence of filum spinosum on distal margin of linea calva on forewings, triangular hypopygium reaching metasomal apex, mesoscutum with incomplete notauli, long veins on forewings and apically expanded antennae. A brief comparative morphological analysis of some structures of the extinct and extant Encyrtidae is provided. The new genus is considered unplaced within Encyrtidae.

Brachyzapus Gauld & Dubois, 2006 is a small genus belonging to the Polysphincta genus-group of the subfamily Pimplinae, with nine known species worldwide (Uchida & Momoi, 1958; Yu et al., 2012; Pham et al., 2012). The genus can be recognized by twisted mandibles, a very weakly convex and rather long clypeus with quite well-defined angulation laterally, elongate lower face, sparse pubescence on the eyes, hind coxal cavities separated from the metasoma insertion by a very strong sclerotized bridge, and the lack of a basal lobe on the ovipositor (Gauld & Dubois, 2006).

The Oriental species of the genus Eridolius Förster, 1869 are reviewed, and a new species, E. xui Reshchikov, sp. nov. is described from Southern China. This is the seventh record of the genus from the Oriental region. The new species can be distinguished from all other Oriental species of the genus by its lower mandibular tooth longer than upper one, face entirely black, and coxae, hind femur and most of metasoma reddish. An illustrated key to the Oriental species of the genus is provided. Eridolius guptai is recorded for the first time from Lao and E. niger is recorded for the first time from Arunachal Pradesh (India).

A new species of ichneumon wasp, Megarhyssa gratiosa sp. nov., is described from Chiapas province in the tropical part of Mexico. This is a southern most record of the genus in the New World. The new species is one of the largest and most spectacular ichneumonid species in the Mexican fauna. Megarhyssa gratiosa sp. nov. differs from its North American congeners primarily by the conspicuous colour pattern of the metasoma which is yellow with broad dorsal black stripe extending along its entire length, and the longer ovipositor. A key to three Mexican species of Megarhyssa is also provided.

Twenty species and six subspecies of nine genera of eumenine wasps with a petiolate metasoma occurring in the Lesser Sunda Islands are listed. New synonymies are proposed for Delta campaniforme campaniforme (Fabricius 1775) (=D. campaniforme gracilior Giordani Soika 1986, syn. nov.) and D. nigriculum Giordani Soika 1986, stat. nov. (=D. campaniforme rendalloide Giordani Soika 1993, syn. nov.). Eumenes piriformis de Saussure and E. inconspicuus Smith are newly recorded from the Lesser Sunda Islands; E. pius Giordani Soika, D. nigriculum Giordani Soika, D. pyriforme (Fabricius), D. sciarum (van der Vecht), Pareumenes nigerrimus van der Vecht, and Labus vandervechti Giordani Soika, are newly recorded from some islands of the Lesser Sunda. Hitherto unknown male of P. nigerrimus is described.

The species of Centris of the hyptidis group are revised. The group, composed by C. hyptidis Ducke, C. hyptidoides Roig-Alsina, and C. thelyopsis n. sp., exhibits unique morphological characters within the genus, like foreand midtrochanters with a laminar expansion at the base, and elaiospathes strongly modified. An updated catalog, and floral and distributional records are provided for each species, as well as an identification key and a distribution map. The male of C. hyptidoides is described for the first time and a modern diagnosis for C. hyptidis is presented. A new species, C. thelyopsis n. sp., is described from Goias State, in central Brazil. It can be easily distinguished from the two previously known species by its predominant orange pilosity, including that of the hind legs and metasoma.

Clistopyga caramba sp. nov. Castillo & Saaksjarvi, collected from the tropical Andean-Amazonian interface in Peru, is described and illustrated. The new species is characterized by highly modified posterior metasomal tergites and a rare colour pattern of the metasoma. Two possible explanations for the bizarre metasomal morphology and colouration are proposed.

In this paper a new species of doryctine wasp of the small and rarely collected genus Labania Hedqvist (Braconidae: Doryctinae) is described and illustrated from Brazil. Labania carolinae sp.n. is similar to Labania minuta Marsh, but it can be easily distinguished by the head yellow, with stemmaticum black, mesosoma and metasoma yellow, legs whitish yellow, propodeum with distinct areola, fore wing vein 1cu-a interstitial with 1M, and long ovipositor.

A second species of Eudiospilus Szepligeti collected from Madagascar, E. rubrumbarus sp.n., is described with an illustrated key to the two known species. Eudiospilus rubrumbarus can be distinguished from E. conradti Szepligeti by the presence of fore wing vein 2a, hind wing with 2-1A short and not reaching wing margin, propodeum without median furrow, ovipositor longer than total length of body, and differences in the coloration of antennal flagellomeres, head, and metasoma. The evolutionary relationship between Eudiospilus and other diospiline genera is discussed.

The European species of Calotelea are reviewed: previously known species are redescribed; two new species are described: Calotelea carbonaria n. sp. and Calotelea laminata n. sp.; and a key to all species is given. Calotelea affinis Kozlov & Kononova is a junior synonym of Calotelea elegans (Masi) syn. nov. and Calotelea ruficollis (Szelenyi) is transferred to Calliscelio comb. nov. Calotelea laminata n. sp. is the first species of Calotelea belonging to the ocularis group to be recorded from Europe. A morphometric analysis is made of the metasoma of females of all European species of Calotelea.

Two Aulacidae, Aulacus uchidai Turrisi & Konishi, sp. n. and Pristaulacus superbus Turrisi & Konishi, sp. n., are described and illustrated from females recently collected in Japan. Aulacus uchidai is recognizable among the other Palaearctic Aulacus by the colour pattern, with the metasoma entirely blackish, the weak and not extensive sculpture on upper frons, weakly rugulose-foveolate, the shape of mesosoma with propodeum declivous, the moderately long and slender apical lobe of hind coxa and the ovipositor length, 0.6–0.9× fore wing length. Pristaulacus superbus is a large species (length: 15.3–17.3 mm) with a long ovipositor (1.5× fore wing length), readily distinguishable from other Palaearctic Pristaulacus by the blue to dull green metallic hue on head and mesosoma, the entirely black metasoma and one tooth-like process on each side of hind surface of propodeum. Including the two new species, the number of Japanese Aulacidae is now nine, two species of Aulacus and seven species of Pristaulacus. Images of both species are freely available at the web site: http:/ /morphbank.net. A revised key for the identification of the Japanese Aulacidae is provided.

Urophonius somuncura n. sp. (Scorpiones, Bothriuridae) is described and illustrated. This species is presumably endemic to the higher plains of the Meseta de Somuncurá (province of Río Negro, Argentina), a basaltic plateau in northern Patagonia. Its nearest relatives are U. granulatus Pocock, from southern Patagonia, and U. tregualemuensis Cekalovic, from central Chile, with all three belonging to the 'granulatus species group'. The diagnostic characters for the new species include the development of the ventral submedian carinae on metasomal segment I, the number of ventral setae on the same segment and presence of tegumentary borders around them, and details of the pigment pattern on carapace, mesosomal tergites and metasoma, among others. U. somuncura n. sp. is seemingly a species active in summer, and its activity period is probably slightly asynchronous in respect to a sympatric Bothriurus species.