Adelius Haliday, 1833

Figs 3–6

Type species: Adelius subfasciatus Haliday, 1833 .

Synonyms: Acaelius Haliday, 1834 (invalid correction); Acoelius Haliday, 1835 (lapsis calami); Anomopterus Rohwer, 1914; Pleiomerus Wesmael, 1835; Pseudoscapiola Perepetchayenko, 1994 (syn. nov.).

Diagnosis. Antenna of female more or less widened submedially, with 20 or 21 antennomeres; seventh antennomere distinctly (in Pseudoscapiola) or not protruding ventrally; eyes short or long setose (Figs 3D, 5B); maxillary palp with 3–5 segments (5 in type species); clypeus distinctly narrower than face (Figs 3D, 5B); prepectal carina absent (Figs 3C, 4B); vein 1- R1 of fore wing at least shortly developed (Figs 3A, 4F, 6D); vein 1-SR of fore wing present (Figs 3A, 4F, 6D); areola of dorsal face of propodeum usually absent or narrow, rarely wide (Figs 4D & E, 6C); first and second metasomal tergites smooth or nearly so; first and second metasomal sutures variable, usually absent or shallowly impressed and smooth (Figs 4D & E, 6C) .

Distribution. Cosmopolitan.

Included species. Adelius adeleae Shimbori & Shaw, 2019, A. amplus Belokobylskij, 1998, A. angustus (Papp, 1997), A. australiensis (Ashmead, 1900), A. bolivariensis Bortoni & Penteado-Dias, 2019, A. boliviensis Bortoni & Penteado-Dias, 2019, A. caatinga Bortoni, Shimbori & Penteado-Dias, 2019, A. cadmium (Papp, 2003), A. canadensis Shimbori & Shaw 2019, A. clandestinus (Foerster, 1851), A. coloradensis Muesebeck, 1922, A. determinatus (Foerster, 1851), A. dubius (Foerster, 1851), A. ecuadoriensis Bortoni & Penteado-Dias, 2019, A. erythronotus (Foerster, 1851), Adelius excelsus Bortoni & Shimbori, 2019, Adelius fasciipennis (Rohwer, 1914), A. floridiensis Shimbori & Shaw, 2019, A. gauldi Shimbori & Shaw, 2019, A. germanus (Haliday, 1834), A. hyalinipennis (Foerster, 1851), A. janzeni Shimbori & Shaw, 2019, A. monteiroi Souza-Gessner, Cerântola & Penteado-Dias, 2019, A. morretesiensis Bortoni, Shimbori & Penteado-Dias, 2019, A. nigripectus Muesebeck, 1922, A. panamensis Shimbori & Shaw, 2019, A. pentagonalis Shimbori & Shaw, 2019, A. quiteriae Souza-Gessner, Cerântola & Penteado-Dias, 2019, A. rudnikovi (Perepechayenko, 1994) comb. nov., A. sancticaroli Bortoni, Penteado-Dias & Shimbori, 2019, A. stenolcos de Saeger, 1944; A. subfasciatus Haliday, 1833, A. viator (Foerster, 1851) .

Notes. We hereby synonymize Pseudoscapiola Perepetchayenko, 1994 (type species and only known species: Myriola rudnikovi Perepetchayenko, 1994) with Adelius as the second author examined the type of Myriola rudnikovi Perepetchayenko. We place this species in Adelius, even though it has a single aberrant character, the 7 th antennomere distinctly protruding ventrally. Adelius rudnikovi (Perepetchayenko, 1994) is a new combination.