用立体显微镜50倍,观察桃棘胫小蠹Phloestribus Liminaris(Harris)的额、前臀板及臀板,可很容易地区别其成虫的牲别(见表)。用额的形态来区别雌雄,对死虫和活虫都行。用前臀板和臀板的形态来区别,对死虫较易,对活虫则由于其腹部末端经常缩在鞘翅下,所以要先将活虫固定好。用前臀板的形态来区和雌雄,效果特别好。 50 times with a stereomicroscope, the amount of Phloestribus Liminaris (Harris), front buttocks and buttocks can be easily distinguished from the adults (see table). The amount of form to distinguish between male and female, dead insects and live worms are OK. The difference between the shape of the front buttocks and the buttocks is easier for the dead insects, and the live insects are often fixed in the sheath wings due to the shrinking of their abdomen ends under the coleoptile. With the shape of the front buttocks area and male and female, the effect is particularly good.