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''Panagaeus cruxmajor'', the crucifix ground beetle, is a rare European ground beetle. In England it occurs in a few places only. ''Panagaeus bipustulatus'' is a commoner relative, looking very much alike except for being smaller. The crucifix ground beetle is sometimes included in ''P. bipustulatus'', but most modern authors consider it distinct. The largely black and rather bristly beetle is in length, with large red spots on its wing cases which give the appearance of a red background behind a black cross. It shelters under pieces of wood during the day, and is a nocturnal predatory species thought to mainly feed on semi-aquatic snails. It was greatly treasured by 19th century collectors, and Charles Darwin recounted an incident when he was an undergraduate at the University of Cambridge around 1828. He had already collected two ground beetles when he "saw a sacred Panagæus crux major". He tried putting one of the other beetles in his mouth to free his hand, but it ejected acrid fluid down his throat, causing him to spit it out and lose all three. ==References== * *(Letter 1009 — C. R. Darwin to Leonard Jenyns, 17 Oct (1846) ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Panagaeus cruxmajor」の詳細全文を読む スポンサード リンク
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