. Il Cambridge storia naturale. Zoologia. HISTERIDAE PHALACRIDAE-NITIDULIDAE ^31. Fig. 111. - Olihrus bicolore. Eiiroiie. Un, larva (dopo Heeger); B, perfetto lusect. età e divorare le larve di Ditteri, ecc. Le relazioni delle formiche'-nest moduli per le formiche non è compilata, ma è altamente probabile che essi mangiano le formiche' larve e fornire le formiche con qualche dolce sapore. Poche specie vivono ui società con le termiti. Fam. 27. Phalacridae.-corpo molto covijutct; elytra che ricopre interamente; giunti ajrical di antenne piuttosto hroadrr, "di solito a lungo ; coxae anteriori globidar ; coxae posteriore c

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. The Cambridge natural history. Zoology. HISTERIDAE PHALACRIDAE—NITIDULIDAE ^31. Fig. 111. — Olihrus bicolor. Eiiroiie. A, Larva (after Heeger); B, perfect lusect. instars, and devour the larvae of Diptera, etc. The relations of the ants'-nest forms to the ants is not made out, but it is highly probable that they eat the ants' larvae, and furnish the ants with some dainty relish. A few species live iu company with Termites. Fam. 27. Phalacridae.—Body very covijutct; elytra entirely covering it; ajrical joints of antennae rather hroadrr, 'usually long ; front coxae globidar ; posterior coxae contiguous; ahdomoi tvith five visihle ventral segments; tccrsi five- jointed., fourth joint usucdly small ctnd obscure. This family consists entirely of small Insects : the tarsal structure is very aberrant, and is also diverse, so that the studeirt may without careful observation pass the Insects over as having only four- jointed tarsi; their structure, so far as the front two pairs are concerned, being very nearly that of many Phytophaga. The larvae live in the heads of flowers, especially of the flowers of Compositae. Having bored their way down the stems, they pupate in earthen cocoons. Heeger ^ says that he has observed in favouraljle seasons six generations ; but the larvae die readily in unfavourable seasons, and are destroyed in vast numbers when the meadows are mowed. Seven years ago very little was known as to the family, and the list of their species scarcely amounted to 100, but now probably 300 are described. They occur in all parts of the world; we have fourteen in Britain. Fam. 28. Nitidulidae.—Antennae ivith a three-jointed club; all the coxae sejiarctted, and each with an exter7ial ^jrolongation ; tarsi five-jointed, the fourth joint smcdler than any of the others ; cdtdomen with five visible plates. These Insects are numerous, about 1600 species being at present known; in many of them the elytra nearly or C|uite cover the hind body, but in many others

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• bookcentury1800
• bookdecade1890
• booksubjectzoology
• bookyear1895