New distributional data concerning 9 species of the family Melasidae Leach, 1817 from Palaearctic region, in accordance with Muona (2007), are provided. Clypeorhagus clypeatus (Hampe, 1850) - first record for Bosnia and Herzegovina; Dromaeolus barnabita (A. Villa & J. B. Villa, 1838) - first record for Georgia; Eucnemis capucina Ahrens, 1812 - first record for Iran; Farsus dubius (Piller & Mitterparcher, 1783) - first records for Bosnia and Herzegovina and Bulgaria; Hylis olexai (Palm, 1955) - first records for Ukraine; Isorhipis melasoides (Laporte, 1835) - first record for Greece; Microrhagus lepidus Rosenhauer, 1847 - first record for Slovenia; Microrhagus pygmaeus (Fabricius, 1792) - first record for Syria; Microrhagus pyrenaeus Bonvouloir, 1872 - first record for Greece.

Superfamily Tenebrionoidea includes many saproxylic species. Our contribution deals with two mycetophagous species, which are rare in central Europe. Mycetophagus fulvicollis is a member of typical saproxylic family Mycetophagidae. This fungus beetle lives under the bark of dead broadleaved trees and is considered a relict of continuous forests. The darkling beetle Platydema violaceum is a member of subfamily Diaperinae, which includes many mycetophagous beetles. Both beetles live under the bark of trees infested by fungi, both are red-listed in many European countries. These saproxylic beetles are probably distributed only in landscape mosaic of people low-impact land use almost within continuous forest stands. There are many studies, that presented the relationship between beetles and wood-decaying fungi, but only a few that presented attraction of beetles to mycelia.

Contribution to the knowledge of biology of jewel beetle Cyphosoma lawsoniae lawsoniae (Chevrolat, 1838) at host plants Bolboschoenus (Bolboschoenus) maritimus (L.) Palla (Cyperaceae) in marshes at northern Tunisia near Tabarka. During three days of incessant observation of adults it was discovered that this species hatching from host plant roots also below the water.

First records from Ukraine of four species of the family Elateridae Leach, 1815: Athous gottwaldi Lohse, 1978; Cidnopus platiai Mertlik, 1996; Limoniscus violaceus (Ph.Müller, 1843) and Zorochros quadriguttatus (Laporte de Castelnau, 1840), are provided.

New distributional data concerning 3 species of the family Throscidae Castelnau, 1840, from Czech and Slovak Republics are provided. Trixagus duvalii (Bonvouloir, 1859) - confirmed occurrence for Slovak Republic; Trixagus exul (Bonvouloir, 1859) – first records for Slovak Republic; Trixagus gracilis Wollaston, 1857 - confirmed occurrence for Czech Republic.

A rewiew of the subfamily Negastriinae Nakane et Kishii, 1956, based on new records and literature data, is made.
There are known eleven species of the subfamily Negastriinae from the territory of the Czech and Slovak Republics: Fleutiauxellus maritimus (Curtis, 1840); Negastrius pulchellus (Linnaeus, 1761); N. sabulicola (Boheman, 1852); Oedostethus quadripustulatus (Fabricius, 1792); O. tenuicornis (Germar, 1824); Quasimus minutissimus (Germar, 1817); Zorochros dermestoides (Herbst, 1806); Z. flavipes (Aubé, 1850); Z. meridionalis (Laporte de Castelnau, 1840) and Z. quadriguttatus (Laporte de Castelnau, 1840). Zorochros stibicki Leseigneur, 1970 is recorded for the first time for the fauna of Czech Republic.
Zorochros ponticus Dolin, 1977, generally considered as synonym of Z. ibericus (Franz, 1967), is considered as synonym of Zorochros quadriguttatus (Laporte de Castelnau, 1840).

A rewiew of findings of two species of the genus Trichius Fabricius, 1787: T. rosaceus (Voet, 1769) and T. sexualis Bedel, 1906 from industrial complex and railway station of Hradec Králové city and railway station of Nymburk city (Czech Republic). Exact position data, biotope photos and notes on biotope conservation possibilities are added to the text.

In the area of the floodplain of Labe river between Vysoká nad Labem and Němčice (Czech republic, Eastern Bohemia) I managed to gather faunistic data of 41 species from the family Elateridae, 7 species from the family Throscidae and 3 species from the family Melasidae. This paper contains the faunistic data, photos of some species and their biotopes, notes to their bionomic and practical conservation of endangered biotopes.

A rewiew of findings of longhorn-beetle Brachyleptura tesserula (Charpentier, 1825) from Eastern Bohemia. Exact position data, biotope photos and notes on biotope conservation possibilities are added to the text.