Trapping liquids may bias the results of beetle diversity assessment.

Several different techniques and methods are used to capture and study beetles (Coleoptera). One option is the use of window traps with various trapping liquids. However, these liquids used in comparative studies may have a biasing effect on the results. The effectiveness of the frequently used liquid baits, involving beer, wine, vinegar, and water as the reference liquid, was compared in this study. Twenty-four traps were assigned to two habitat categories (sunny and shady) and four kinds of bait: beer, wine, vinegar, and water. During the study from June to July 2021, a total of 29,944 invertebrates were captured; of these, 3,931 individuals belonged to Coleoptera. A total of 3,825 beetles were identified, belonging to 120 species and 36 families. The most abundant family was Nitidulidae, with 3,297 adults (86% of the total). The number of arthropods differed only in the trapping liquid, and the captures were similar between beer and wine and between vinegar and water. The trapping liquid had a more significant effect on beetle abundance and species richness. In contrast, exposure had a significant effect only on the number of beetle species and a higher ratio of beetles was found in the shade. Beer and wine were very attractive and collected similar beetle communities. However, the diversity (Shannon's index) was low due to the high abundance of several species. Traps with vinegar and water collected a similar composition and species richness. After removing sap beetles (Nitidulidae) from all traps, a significant difference was still recorded between trapping liquids in the number of individuals and species, and their communities were much more similar. Thus, at high abundances of sap beetles, it is possible to exclude them from analyses and obtain more accurate data when assessing environmental variables. The results showed that the type of trapping liquids used can have substantial effects on abundance and species composition captured beetles in traps especially for beer and wine. The beer and wine in traps can significantly influence the subsequent biodiversity assessment. We recommend the use of trapping liquids without the baiting effect to correctly assess the effect of environmental variables on beetle richness and abundance.

Small-scale spontaneous dynamics in temperate beech stands as an importance driver for beetle species richness.

Natural dynamics in forests play an important role in the lives of many species. In the landscape of managed forests, natural disturbances are reduced by management activities. This usually has a significant effect on insect diversity. The effect of small-scale natural dynamics of protected beech stands on the richness of saproxylic and non-saproxylic beetles was investigated. Sampling was carried out by using flight interception traps in the framework of comparing different developmental stages: optimum, disintegration, and growing up, each utilizing 10 samples. We recorded 290 species in total, of which 61% were saproxylic. The results showed that the highest species richness and thus abundance was in the disintegration stage. In each developmental stage, species variation was explained differently depending on the variable. Deadwood, microhabitats, and canopy openness were the main attributes in the later stages of development for saproxylic beetles. For non-saproxylics, variability was mostly explained by plant cover and canopy openness. Small-scale disturbances, undiminished by management activities, are an important element for biodiversity. They create more structurally diverse stands with a high supply of feeding and living habitats. In forestry practice, these conclusions can be imitated to the creation of small-scale silvicultural systems with active creation or retention of high stumps or lying logs.

Taxonomic, distributional and biological study of the genus Agrilus/ (Coleoptera: Buprestidae). Part III.

Two hundred and eighteen taxa of the genus Agrilus (Coleoptera, Buprestidae) mostly from the Palaearctic and Oriental regions are studied and their taxonomic, nomenclatural, distributional or biological data are updated. For some species, the biological information is supplemented by images from the field, or distributional data by maps showing the whole range of the species. The synonymy of following Agrilus is updated: A. blairi Bourgoin, 1925 (A. telawensis Fisher, 1935 syn. nov.); A. lancifer Deyrolle, 1864 (A. perakianus Kerremans, 1900 syn. nov.); A. lestagei Théry, 1930 (A. collartianus Descarpentries Villiers, 1963 syn. nov.); A. lugubris Kerremans, 1914 (A. achilleus Obenberger, 1935 syn. nov.); A. ocularis Deyrolle, 1864 (A. capitatus Deyrolle, 1864 syn. nov.), A. bidentellus Obenberger, 1924 syn. nov.) and Agrilus velatus Kerremans, 1912 (A. kuchingensis Tôyama, 1987 syn. nov.). The invalid synonyms A. myrmido Kerremans, 1912; A. myrmidonius Obenberger, 1936 and A. miwai Théry, 1936 are moved from the synonymy of A. achilleus Obenberger, 1935 to synonymy of A. lugubris Kerremans, 1914. A. massanensis Schaefer, 1955 is downgraded to subspecies A. pratensis massanensis Schaefer, 1955 status nov. The specific name samyi Baudon, 1968 is resurrected from the synonymy of A. suturaalba Deyrolle, 1864 and revalidated as Agrilus samyi Baudon, 1968 (nomen revalidatum).

Four new Tapinomorphus Hartmann species from Angola, Zambia and Zimbabwe (Coleoptera: Curculionidae: Entiminae: Sciaphilini).

Four new Tapinomorphus species are described and illustrated: Tapinomorphus angolanus sp. nov. from Angola, T. kudrnai sp. nov. from Zambia, T. latipennis sp. nov. and T. verunkae sp. nov. from Zimbabwe. This brings the total number of species in the genus to 20. Habitus images and illustrations of important characters are provided.

Revision of the Agrilus purpurifrons species-group (Coleoptera, Buprestidae, Agrilinae).

The Agrilus purpurifrons species-group comprising twelve species from the Oriental region is defined and revised. A key to species is provided and complemented with illustrations of habitus and genitalia. Three new species are described: Agrilus cameronius sp. nov. (Malaysia); A. puncak sp. nov. (Indonesia); and A. vendibilis sp. nov. (Indonesia). The following taxonomic changes are proposed: the specific names lacroixi Obenberger, 1936 syn. nov. and chapaensis Descarpentries Villiers, 1967 syn. nov. are junior synonyms in the synonymy of A. morio Kerremans, 1895; the name rousselatae Baudon, 1968 stat. rev. is removed from the synonymy of A. lacroixi Obenberger, 1936 and revalidated as the specific name of A. rousselatae Baudon, 1968.

Ellimenistes humeralis Marshall, 1947 and its allies (Coleoptera: Curculionidae: Entiminae: Embrithini).

The Ellimenistes humeralis Marshall, 1947 species group is defined. Ellimenistes humeralis is redescribed, three new species belonging to this species group are described, illustrated and keyed: E. janaki Borovec Nakládal, sp. nov., E. marshalli Borovec Nakládal, sp. nov. and E. raucus Borovec Nakládal, sp. nov., all from South Africa, Eastern Cape. A lectotype of Ellimenistes humeralis Marshall, 1947 is designated. The diagnosis of the genus Ellimenistes is completed with illustrations of the female genitalia provided for the first time.

Nine new Agrilus (Coleoptera: Buprestidae, Agrilini) from Palaearctic and Oriental regions.

Nine new Agrilus from the Palaearctic and Oriental regions are described and illustrated: Agrilus baiocchii sp. nov. (India, Nepal, Pakistan, Thailand); A. baiyangling sp. nov. (China: Shaanxi); A. gorgan sp. nov. (Iran); A. graminis persicus ssp. nov. (Iran); A. iranopecirkai sp. nov. (Iran); A. muralis sp. nov. (China: Beijing); A. mus sp. nov. (Turkey); A. ressli sp. nov. (Iran); A. uzala sp. nov. (Russia: Primorye). The distributional range of A. araxenus Yablokov Khnzoryan, 1960 is updated.

Revision of the Agrilus vittatus species-group (Coleoptera, Buprestidae, Agrilinae).

The Agrilus vittatus species-group comprising fifteen species from the Oriental region is defined and revised. A key to species is provided and complemented with illustrations of habitus and genitalia. Five new species are described: Agrilus acacivorus sp. nov. (Myanmar); A. albizivorus sp. nov. (North India, Nepal); A. coco sp. nov. (Philippines); A. monadikos sp. nov. (Laos) and A. occultus sp. nov. (Laos, Thailand). Seven new junior subjective synonyms are proposed for following taxa: Agrilus babaulti Théry, 1930 (= bonadonai Descarpentries Villiers, 1963 syn.nov.); A. terraereginae Blackburn, 1892 (= deerratus Curletti, 2006 syn.nov.) and A. viridicupreus Saunders, 1866 (= cylindratus Kerremans, 1896 syn.nov., = albizziae Fisher, 1935 syn.nov., = javicola Fisher, 1935 syn.nov., = cariosulus Obenberger, 1935 syn.nov., = theodasae Baudon, 1968 syn.nov.).

Taxonomic, distributional and biological study of the genus Agrilus (Coleoptera: Buprestidae). Part II.

Two hundred and twenty-six species of the genus Agrilus (Coleoptera, Buprestidae) mostly from the Palaearctic and Oriental regions are studied and their taxonomic, nomenclatural, distributional or biological data are updated. For some species, the biological information is supplemented by images from the field, and distributional data by maps showing the whole range of the species. Two west palaearctic species Agrilus angustulus (Illiger, 1803) and A. graminis Kiesenwetter, 1857 are recorded from the Russian Far East. The following three new junior subjective synonyms are proposed. Agrilus alexeevi Bellamy, 1998 syn. nov. (synonym of A. relegatus Curletti, 1990); A. bicoloratus Abeille de Perrin, 1894 syn. nov. (synonym of A. angustulus (Illiger, 1803)) and A. splendidicollis Fairmaire, 1889 syn. nov. (synonym of A. sinensis Thomson, 1879).

Seychellister mornicus, a new genus and species of Clavigeritae (Coleoptera, Staphylinidae, Pselaphinae) from Seychelles.

Seychellister mornicus, gen. and sp. nov. is described based on three specimens collected by sifting of leaf-litter in Mahé, Seychelles. The genus is tentatively placed in the subtribe Clavigerodina (Pselaphinae: Clavigeritae: Clavigerini).

New species and records of Clavigeritae (Coleoptera: Staphylinidae: Pselaphinae) from Africa and Asia.

New species of Clavigeritae, Monodiger ivoricus sp. n. from Ivory Coast and Disarthricerus bruneicus sp. n. from Brunei are described. New records are given for the following species: Zuluclavodes Hlavác, 2007 new genus for Zambia, Fustigerinus formicarius Bryant, 1943 (new combination), new genus and species for Ivory Coast and Hoplitoxenus joannae Jeannel, 1960, new genus and species for Cameroon. A new locality in South Africa is recorded for Ischyroceros mirus Reichensperger, 1915.

A new species of Ubychia Rost, 1893 (Coleoptera: Curculionidae: Brachycerinae) from the island Samos, Greece, with a discussion on the distribution of the genus.

The new species, Ubychia assingi sp. nov., an endogean and anophthalmous weevil is described from the Greek island Samos. A list of species of the genus is given and the distribution and a posible biogeographic scenario for the genus is discussed.

Eudraces barclayi sp. nov., with some notes on the genus Eudraces Marshall (Coleoptera: Curculionidae: Entiminae: Myorhinini).

Eudraces barclayi sp. n. is described from South Africa, illustrated and compared with other species of the genus. Echinocnemodes Voss, 1962 is proposed as a new junior synonym of Eudraces Marshall, 1926. Holcolaccus sparsus (Voss, 1959) is proposed as a new combination from Eudraces Marshall, 1926. Eudraces zumpti Voss, 1959 is a new junior synonym of Eremnus angustirostris Marshall, 1937. A lectotype is designated for Eudraces flavirostris Marshall, 1926. A key to the known Eudraces species is given.

Paracrossidius radekcervenkai (Coleoptera: Scarabaeidae: Aphodiinae), a new species from China.

A new species of Paracrossidius Balthasar, 1932 (Coleoptera Scarabaeidae: Aphodiinae) from China is described and compared with similar species. Paracrossidius was originally described as a monotypic subgenus based on the type species Aphodius (Paracrossidius) instigator Balthasar, 1932 from Sichuan Province, China. Paracrossidius is currently considered a genus with 10 previously described species, most of which inhabit various parts of China (Dellacasa et al. 2016).

Revision of the Agrilus wittemani species-group (Coleoptera: Buprestidae: Agrilini) with description of three new species from India and Myanmar.

The newly defined Agrilus wittemani species-group comprising six species from South and Southeast Asia is revised based on the examination of type specimens. A key to species is provided and complemented with illustrations of habitus and genitalia. The following three new species are described: Agrilus amplinotus sp. nov.; A. stigmula sp. nov.; A. stigmulifer sp. nov.

The Pselaphinae (Coleoptera: Staphylinidae) of Madagascar. VI. Description of Ambohitantella banari gen. et sp. n. with notes on Nearticerodes Jeannel, 1954 and Triceratomerus Jeannel, 1960.

A new genus and a new species, Ambohitantella banari gen. et sp. n., from Madagascar (Ambohitantely Special Reserve) is described. The diagnosis is given for related genera Triceratomerus Jeannel, 1960 and Nearticerodes Jeannel, 1954. The lectotype is designated for Triceratomerus sparsepunctatus Jeannel, 1960. An identification key to genera of malagasy Clavigerodina with 3-segmeneted antennae is provided.

The Pselaphinae (Coleoptera: Staphylinidae) of Madagascar. IV. Contribution to the knowledge of subtribes Hoplitoxenina and Dimerometopina with description of a new species of Hadrophorus Fairmaire, 1898.

The subtribe Dimerometopina Célis, 1970 is reestablished. A key and catalogue of the species of subtribes Hoplitoxenina and Dimerometopina is provided; a key to species of the genus Hadrophorus Fairmaire, 1898 is also given. Hadrophorus martinkae sp. n. from Madagascar, Montagne d'Ambre is described. New records for Hadrophorus spinipennis Célis, 1969 (Madagascar, Zombitse N.P.) and Hoplitoxenus joannae Jeannel, 1960 (Cameroon and Gabon, first record) are provided.

A new species of Neuraphes Thomson, 1859 (Coleoptera: Staphylinidae: Scydmaeninae) from Kazakhstan.

Neuraphes (s. str.) kazakhstanicus, new species of the tribe Cyrtoscydmini, is described from Kazakhstan. The genus is for the first time recorded from Central Asia. A detailed morphological study is presented.

A contribution to knowledge of Dermestidae (Coleoptera) from Kazakhstan with description of one new species.

Research on skin beetles of tugai forests with use of passive window traps was performed in Almaty region in Kazakhstan in 2013. Ctesias (Decemctesias) yuliyae sp. nov. is described, illustrated, and compared with similar species of the genus Ctesias subgenus Decemctesias Háva, 2004. The new species differs by the structure of antennae and male genitalia. Eighteen other dermestid species from Kazakhstan were also recorded in this study. 

Endogean and cavernicolous Coleoptera of the Balkans. XIV. Melledobythus bilandzijae, new genus and species of cavernicolous Bythinini (Staphylinidae: Pselaphinae) from the Island Mljet, Croatia.

Melledobythus bilandzijae, new cavernicolous genus and species of the tribe Bythinini is described from the island of Mljet, Croatia. A detailed morphological study is presented. The new genus belongs to the phylogenetic lineage of small and anophthalmous Bythinini that lack sutural elytral striae.