. Die Cambridge Natural History. Zoologie. 2. also COLEOPTERA Fam. 26. Histeridae. - Sehr kompakt Käfer, mit sehr harten Körperdecke, kurze, fastenzeit Antennen, mit einem RERI/comjxtct hyiwrjlottis chtb: Keine. Locly aiipliecl Mytra eng zu, Hütte gerade hinter zwei Segmente ausgesetzt. Abdomen loith Jive sichtbar ventrcd Segmente; mit sieben Segmenten dursal, cdl Hart. Vordere Coxa stark Quer, hind Coxa luidely getrennt. Die äußerst kompakte Bauform und harte Körperdecke, mit der eigenartigen Antennen - bestehend aus einem langen basalen Gemeinsamen, sechs oder sieben kleine Gelenke kombiniert, und dann eine sehr solide Club

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. The Cambridge natural history. Zoology. 2.so COLEOPTERA Fam. 26. Histeridae.— Very compact beetles, with very hard integument, short, lent antennae, with a reri/ comjxtct chtb: no hyiwrjlottis. Mytra closely aiipliecl to locly, hut straight behind, leaving two segments exposed. Abdomen loith Jive visible ventrcd segments; with seven dursal segments, cdl hard. Front coxae strongly transverse, hind coxae luidely separated. The extremely compact form, and hard integument, combined with the peculiar antennae—consisting of a long basal joint, six or seven small joints, and then a very solid club of three joints covered with minute pubescence — render these Insects unmistakable. The colour is usually shining black, but there are numerous depar- tures from this. The way in which these Insects are put together so as to leave no chink in their hard exterior armour when in repose, is very remark- able. The mouth - parts are rather highly developed, and the family is entitled to a high rank; it consists at present of about 2000 species ; ^ in Britain we have about 40. The larvae are without ocelli or labrum, Fig. UO.—Platysoma depressmn. Europe, but have WCll-developed mandi- A, Larva (after Schiodte) ; B, perfect , -, , -, , i j.i, • 3 jyggct. " ' ^ hies, the second and third thoracic segments being short, the ninth segment of the abdomen terminal, with two distinctly jointed cerci.^ Histeridae are common in dung, in carcases, decay- ing fungi, etc., and some live under bark—these being, in the case of the genus Hololepta, very flat. Some are small cylinders, elaborately constructed, for entering the burrows of Insects in wood {Trypanaeus^; a certain number are peculiar to ants' nests. Formerly it was supposed that the Insects were nourished on the decaying substances, but it is now believed, with good reason, that they are eminently predaceous, in both larval and imaginal ' The family was monographed by the Abbe de Marseul in Ann. Soc. ent. France, 1853-186

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• bookcentury1800
• bookdecade1890
• booksubjectzoology
• bookyear1895