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STERNOXIA .—ThiS is an important tribe of beetles, including families with four malpighian tubes and only five or six abdominal sterna, while in the See also:thorax there is a backwardly directed See also:process of the prosternum that fits into a mesosternal cavity. The larvae are elongate and See also:worm-like, with See also:short legs but often with hard strong cuticle. The Elateridae or click beetles (fig. 18) have the prosternal process C just mentioned, capable of See also:movement in and out of the mesosternal cavity, the beetles being thus enabled to leap into the See also:air, hence their popular name of " click-beetles " or " skip-jacks.' 'The prothorax is See also:convex in front, and is usually See also:drawn out behind into a prominent process on either See also:side, while the elytra are elongate and tapering. b c a Many of the tropical See also:American Elateridae emit See also:light from the spots on the prothorax and an See also:area beneath the See also:base of the See also:abdomen; these are " fireflies " (see above). The larvae of Elateridae are elongate, worm-like grubs, with narrow bodies, very See also:firm cuticle, short legs, and a distinct anal proleg. They are admirably adapted for moving through the See also:soil, where some of them live on decaying organic See also:matter, while others are predaceous. Several of the elaterid larvae, however, gnaw roots and are highly destructive to See also:farm crops. These are the well-known' " See also:wire-See also:worms " (q.v.). The Buprestidae are distinguished from the Elateridae by the immobility of the prosternal process in the mesosternal cavity and by the See also:absence of the lateral processes at the See also:hind corners of the prothorax. Many tropical Buprestidae are of large See also:size (fig. 19), and exhibit magnificent metallic See also:colours; their elytra are used as ornaments in human See also:dress. The larvae are remarkable for their small See also:head, very broad thorax, with reduced legs, and narrow elongate abdomen. They feed by burrowing in the roots and stems of See also:plants. Additional information and CommentsThere are no comments yet for this article.
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