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Fire ant
Fire ant is the common name for several species of ants in the genus ''Solenopsis''. They are, however, only a minority in the genus, which includes over 200 species of ''Solenopsis'' worldwide. ''Solenopsis'' are stinging ants and most of their common names reflect this, for example, ginger ants and tropical fire ants. Many species also are called red ants because of their light brown colour, though species of ants in many other genera are similarly named for similar reasons. Examples include ''Myrmica rubra'' and ''Pogonomyrmex barbatus''.
None of these names applies in all countries nor to all species of ''Solenopsis'', nor only to ''Solenopsis'' species; for example the colloquial names for several species of weaver ants in the genus ''Oecophylla'' in Southeast Asia include "fire ants" because of their red color and painful sting; the two genera, however, are not closely related. Also, ''Wasmannia auropunctata'' is commonly called the "little fire ant."〔(【引用サイトリンク】url=http://www.hear.org/species/wasmannia_auropunctata/ )〕
==Appearance==
The bodies of mature fire ants, like the bodies of all typical mature insects, are divided into three sections: the head, the thorax, and the abdomen, with three pairs of legs and a pair of antennae. Fire ants of those species invasive in the United States can be distinguished from other ants locally present, by their copper brown head and body with a darker abdomen. The worker ants are blackish to reddish, and their size varies from . In an established nest these different sizes of ants all are present at the same time.
''Solenopsis'' spp. ants can be identified by three body features—a pedicel with two nodes, an unarmed propodeum, and antennae with 10 segments plus a two-segmented club. Many ants bite, and formicine ants can cause irritation by spraying formic acid; myrmecine ants like fire ants have a dedicated venom-injecting sting, which injects an alkaloid venom, as well as mandibles for biting.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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