Detailed re-descriptions and the geographical distribution of these two species are given and a neotype deposited in the MNHN (Paris) is designated for A. tahitensis.The author reports about the results of a study of Porthetinae (Pamphagidae) and other Acridoidea preserved in some European museums. The taxonomy of African Porthetinae is still poorly known; some genera were established on variable characters (e.g. the number of the flagellum segments, the shape of the hind femora or the prosternal tubercle) and collections generally hold only few specimens of this group. These insects are characterized by a remarkable sexual dimorphism, the males generally are winged while females are apterous. Because many species were described only from one sex (sometimes the female sex), there are objective difficulties to identify them correctly. The following synonymies are proposed here Pagopedilum Karsch, 1896 = Stolliana Bolívar, 1916; Pagopedilum brevis (Walker, 1870) = Pagopedilum martini Bolívar, 1915; Cultrinotus poultoni Bolívar, 1915 = Cultrinotus luanensis Uvarov, 1953. The male of Pagopedilum bradyanum (Saussure, 1887) and adults male and female of Pagopedilum brevis (Walker, 1870) (known only from the nymph) are described. The distinction of the genera Lobosceliana Dirsh, 1958 and Xiphoceriana Dirsh, 1958 is revealed to be very difficult and they are probably synonyms, but more material should be studied. The stridulatory system found in different genera of Porthetinae is briefly described. Further, the South African Batrachotetrix cantans Saussure, 1888 (Pamphagidae Akicerinae) is recorded for the first time in Namibia, Barombia tuberculosa sublaevis Bolívar, 1905 (Acrididae Catantopinae) is synonymized with B. t. tuberculosa Karsch, 1891, a probable new brachypterous species of Rhachitopis (Acrididae Euryphyminae) is reported from Angola, the Namibian Pycnodictya herero Karny, 1910 (Acrididae Oedipodinae) is recorded for the first time from Angola, and the Tanzanian Tmetonota dispar Miller, 1929 (Acrididae Oedipodinae) is recorded for the first time from Kenya.A checklist of the fishes of the Coto River basin, southern Pacific, Costa Rica, compiled from field and museum surveys is presented. A total of 61 species, representing 48 genera, 26 families and 11 orders are listed. Peripheral species were dominant (44.3%), whereas secondary and primary freshwater species represented 32.8% and 23.9% of the total diversity. The orders Cyprinodontiformes (12 spp.) and Perciformes (11) and the families Poeciliidae (8) and Cichlidae (7) were the most diverse. Two species (Lutjanus guttatus and Polydactylus approximans) were new records for Costa Rican freshwaters and ten additional species were found to have expanded geographical ranges. An identification key and a complete photographic album of all fish species recorded are presented. This investigation provides a framework for future studies on fishes from this area complementing previous efforts seeking to increase our knowledge about the freshwater ichthyofauna of the central and southern Pacific regions of Costa Rica.A new species of soldier beetles of the subfamily Cantharinae, Cacomorphocerus meridionalis sp. nov., is described from Upper Eocene Rovno amber. It is the second time that a Cacomorphocerus species with 11-segmented antennae has been discovered. The status of the tribe Cacomorphocerini is discussed.The known Chinese fauna of the genus Sathytes Westwood (Pselaphinae Batrisini) is comprised of 15 species. Here we describe five more species from eastern China S. communis Shen Yin, sp. nov. (from Anhui, Zhejiang and Jiangxi), S. fenghuang Shen Yin, sp. nov. (from Zhejiang), S. jinggang Shen Yin, sp. nov. (from Jiangxi), S. obliquus Shen Yin, sp. nov. (from Zhejiang), and S. similis Shen Yin, sp. nov. (from Zhejiang and Jiangxi). Moreover, Sathytes larinus Yin Li, originally known from Fujian, is newly recorded from Zhejiang.The lace bug genus Heissiella Péricart, 1984 (Hemiptera Heteroptera Tingidae) is recorded from Japan for the first time, and a new species, which has been recorded as ‘Tingis (Tropidocheila) sp.’ or ‘Tingis (Tropidocheila) shaowuana Drake Maa, 1953’ (misidentification) by previous authors, is described under the name of H. donguri sp. nov. This new species was found on the leaves of Quercus gilva Blume (Fagaceae) in the laurilignosa ecosystem of Honshu and Kyushu, extending the known distribution range of the genus into the Palaearctic Region. The distribution range and the host plant relationship of the new species are discussed. A key to all described species of the genus and a photograph of a living individual for the new species are also presented.The genus Systellapha Enderlein, currently treated as part of Grallipeza Rondani, is resurrected and redescribed to include S. ornatithorax Enderlein and two new species, S. digifurca and S. ornatifemur. The genus is diagnosed by its extremely broad palpus and characteristic silvery thoracic vittae, and further defined by characters of the male and female terminalia.Four new species, Diduga luteogibbosa n. sp., D. allodubatolovi n. sp., D. scalprata n. sp. and D. hainanensis n. sp. are described from China along with three newly recorded species, D. albicosta Hampson, 1891, D. nigridentata Bayarsaikhan Bae, 2019 and D. hanoiensis Bayarsaikhan Bae, 2019. A key to the Chinese species of the genus Diduga, with illustrations of adults and genitalia of examined species are presented.The DNA barcodes of Chinese Plecoptera project has a goal to promote species identification, life stage association, systematic, conservation, biodiversity, and population genetic studies for stoneflies of China. In this study, we sequenced and analyzed 19 DNA barcode sequences belonging to 19 stonefly species, increasing the Chinese barcoded stonefly species number to 53. Genetic distances were calculated and the gene trees constructed, suggesting the efficiency of delimiting Chinese stonefly species using DNA barcodes.Two new species of the genus Caloxiphus Saussure Pictet, 1898 (Pseudophyllinae) are described C. chapulhuacan n. sp., and C. cuicani n. sp., both endemic to the Huasteca Region, State of Hidalgo, Mexico. These two new taxa show morphological affinities to C. championi Saussure Pictet, 1898. However, they may be separated from the latter species on basis of external and internal (genitalia) morphological characters that are provided and illustrated. Acoustic signals for C. cuicani n. learn more sp., and information on distribution for both new taxa are given.