一双向内弯曲的前腿，比躯干还长;头部和胸部呈墨色绿，犹如披上了一件“青铜甲”;褐色的背壳上，还有漂亮的橙色、金色斑点，在成都华希昆虫博物馆，有这样一只奇特的甲虫。

  它就是格彩臂金龟或格长臂金龟，是国家二级重点保护野生动物。

  It hasinwardly curved forelegslonger than itstorso, dark-greenhead and chest as if covered with a "bronze armor"and orange and gold spots on its brown back.In Chengdu Huaxi Insect Museum, there is a peculiar beetle, Cheirotonus gestroi, a national second-class protected animal in China.

  若不仔细看，还真能把它误认为绿儿虫。不过，绿儿虫通身绿色，格彩臂金龟前胸背板古铜色泛绿紫光泽，鞘翅黑褐，有许多不规则黄褐色斑点，有些斑点中有黑褐小点，其余体表为金紫色。

  If notlookingcarefully, you maymistake it for a green worm. However, the green worms are green all over, while the front and back of theCheirotonus gestroi are bronze with greenish-purple lusterand the elytra areblack-brownwith irregular yellow-brown spots, some of which areblack-brown dots, and the rest of the body is golden-purple.

  它的前腿为什么那么长?专家解释，这主要和求偶有关。雌性往往躲在比较深的树洞里，雄性发现以后会用长长的前脚伸进树洞去撩拨雌性。雌性爬出树洞以后，它会立刻用这对长长的前脚把雌性抱住，方便进行交配。但是，过长的前脚也在一定程度上限制了它们的活动能力，遇到危险时，它们会通过装死来躲避天敌。

  Why are its front legs so long? Experts explain that itrelatesto courtship. Females tend to hide in deeper holes, and the male will use his long front legs to reach into the hole andtease the female. After the female climbs out of the hole, he will immediately use the pair of long front feet to hold the female and mate with her. However, their long front feet also limit their mobility to some extent, and they play dead to avoid predators when in danger.