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This contribution deals with the genus Scopaeus Erichson, 1839 (Coleoptera, Staphylinidae, Paederinae) in Indonesia with a focus on the fauna of the Mount Halimun-Salak National Park, Jawa Barat. Nineteen new species are described: Scopaeus anuliflagellatus Frisch, spec. nov., S. batukaruensis Frisch, spec. nov., S. bipectenatus Frisch, spec. nov., S. bipennicillatus Frisch, spec. nov., S. crassipunctatus Frisch, spec. nov., S. cuspidatus Frisch, spec. nov., S. cuspilobatus Frisch, spec. nov., S. diversilobatus Frisch, spec. nov., S. grandis Frisch, spec. nov., S. halimunsalakensis Frisch, spec. nov., S. heronifer Frisch, spec. nov., S. posoanus Frisch, spec. nov., S. pulcher Frisch, spec. nov., S. riedeli Frisch, spec. nov., S. spiraliflagellatus Frisch, spec. nov., S. sulawesianus Frisch, spec. nov., S. tortuosiflagellatus Frisch, spec. nov., S. uncinatus Frisch, spec. nov. and S. velifer Frisch, spec. nov.. Based on type revisions, S. borneensis Cameron, 1941, S. elegantulus Cameron, 1930, S. jacobsoni Cameron, 1930, S. javanus Cameron, 1936, S. mixtus Cameron, 1941 and S. niger Cameron, 1918 are redescribed. Lectotypes are designated for S. javanus and S. niger. New distribution data from Indonesia are presented for S. filiformis Wollaston, 1867, S. limbatus Kraatz, 1859, S. nitidulus Motschulsky, 1858, S. sundaensis Frisch, 2005, S. testaceus Motschulsky, 1858, S. unifasciatus Fauvel, 1889 and S. wunderlei Frisch, 2003. Scopaeus dilutus Motschulsky, 1858, S. fusculus Motschulsky, 1858, S. micros Kraatz, 1859, S. procerus Kraatz, 1859, S. subfasciatus Kraatz, 1859 and S. velutinus Motschulsky, 1858 are excluded from the fauna of Indonesia owing to unproven records or misidentification. A catalogue of the Scopaeus species of Indonesia including their known distribution at the province level is given.

Here we present 28 new species of Trigonopterus from Central Sulawesi, mostly from Mt Dako and Mt Pompangeo: Trigonopterus acutus sp. nov., T. ancora sp. nov., T. arcanus sp. nov., T. corona sp. nov., T. dakoensis sp. nov., T. daun sp. nov., T. ewok sp. nov., T. gundala sp. nov., T. hoppla sp. nov., T. kakimerah sp. nov., T. katopasensis sp. nov., T. matakensis sp. nov., T. moduai sp. nov., T. mons sp. nov., T. paramoduai sp. nov. T. pomberimbensis sp. nov., T. pompangeensis sp. nov., T. puspoi sp. nov., T. rosichoni sp. nov., T. rubidus sp. nov., T. sarinoi sp. nov., T. sutrisnoi sp. nov., T. tanah sp. nov., T. tejokusumoi sp. nov., T. toboliensis sp. nov., T. tolitoliensis sp. nov., T. tounaensis sp. nov., T. unyil sp. nov. This fills important areas of distribution and brings the number of Trigonopterus species recorded from Sulawesi to 132.

Based on recent fieldwork, the hyperdiverse weevil genus Trigonopterus Fauvel is recorded for the first time from the Indonesian Tanimbar Archipelago, halfway between Australia and Western New Guinea. All seven species discovered on Tanimbar are new to science, and described here: Trigonopterus atuf sp. nov., T. kumbang sp. nov., T. laratensis sp. nov., T. porg sp. nov., T. selaruensis sp. nov., T. tanimbarensis sp. nov., and T. triradiatus sp. nov. The new species are authored by the taxonomists-in-charge, Raden Pramesa Narakusumo and Alexander Riedel. This fauna appears discordant and established by relatively recent dispersal from New Guinea and other Moluccan islands.

The genus Trigonopterus Fauvel, 1862 is highly diverse in Melanesia, the Moluccas, and the Sunda Islands. Only one species, Trigonopterus fulvicornis (Pascoe, 1885) was so far recorded from Sulawesi. Based on focused field-work the fauna from Sulawesi and nearby islands is here revised. We redescribe T. allotopus Riedel newly recorded for Sulawesi and describe an additional 103 new species: T. abnormis sp. n., T. adspersus sp. n., T. ambangensis sp. n., T. ampanensis sp. n., T. analis sp. n., T. arachnobas sp. n., T. armipes sp. n., T. artemis sp. n., T. asterix sp. n., T. barbipes sp. n., T. bonthainensis sp. n., T. carinirostris sp. n., T. castaneipennis sp. n., T. celebensis sp. n., T. cirripes sp. n., T. collaris sp. n., T. costatulus sp. n., T. curvipes sp. n., T. crenulatus sp. n., T. cricki sp. n., T. darwini sp. n., T. ejaculatorius sp. n., T. fuscipes sp. n., T. gracilipes sp. n., T. heberti sp. n., T. hirsutus sp. n., T. humilis sp. n., T. hypocrita sp. n., T. idefix sp. n., T. impressicollis sp. n., T. incendium sp. n., T. incognitus sp. n., T. indigenus sp. n., T. inhonestus sp. n., T. invalidus sp. n., T. jasminae sp. n., T. klabatensis sp. n., T. kolakensis sp. n., T. kotamobagensis sp. n., T. laevigatus sp. n., T. lampros sp. n., T. latipennis sp. n., T. lompobattangensis sp. n., T. luwukensis sp. n., T. mahawuensis sp. n., T. manadensis sp. n., T. mangkutanensis sp. n., T. matalibaruensis sp. n., T. mesai sp. n., T. minahassae sp. n., T. moatensis sp. n., T. modoindingensis sp. n., T. nanus sp. n., T. nitidulus sp. n., T. obelix sp. n., T. ovalipunctatus sp. n., T. ovatulus sp. n., T. pagaranganensis sp. n., T. palopensis sp. n., T. paracollaris sp. n., T. pauper sp. n., T. pendolensis sp. n., T. posoensis sp. n., T. prismae sp. n., T. procurtus sp. n., T. pseudallotopus sp. n., T. pseudanalis, sp. n., T. pseudovatulus sp. n., T. pseudovalipunctatus sp. n., T. pseudofulvicornis sp. n., T. pseudomanadensis sp. n., T. pseudosimulans sp. n., T. pumilus sp. n., T. rantepao sp. n., T. reticulatus sp. n., T. rhombiformis sp. n., T. rotundatus sp. n., T. rotundulus sp. n., T. rudis sp. n., T. rufipes sp. n., T. sampunensis sp. n., T. sampuragensis sp. n., T. satyrus sp. n., T. scabripes sp. n., T. scaphiformis sp. n., T. scitulus sp. n., T. selayarensis sp. n., T. serripes sp. n., T. seticnemis sp. n., T. silvicola sp. n., T. squalidulus sp. n., T. sulawesiensis sp. n., T. suturatus sp. n., T. tatorensis sp. n., T. tenuipes sp. n., T. tomohonensis sp. n., T. toraja sp. n., T. vicinus sp. n., T. viduus sp. n., T. volcanorum sp. n., T. wangiwangiensis sp. n., T. watsoni sp. n., and T. yoda sp. n. All new species are authored by the taxonomist-in-charge, Alexander Riedel.