snow flea
noun
1- either of two small insects that appear on or near snow in northern regions or on mountains在北方或高山雪地或其附近发现的两种小虫之一：
1.1
- a small flightless scorpion fly which feeds on mosses (family Boreidae, including the Eurasian Boreus hyemalis); North American name: snow scorpion fly.雪蝎蛉（雪蝎蛉科, 包括欧亚产的冬雪蝎蛉）。北美名：snow scorpion fly.
1.2
- a springtail that often swarms on snow, making it appear black (family Isotomidae, including the Alpine Isotoma saltans and the North American Hypogastrura nivicola).雪蚤（等节跳虫科, 包括阿尔卑斯产的弹尾跳虫和北美产的紫）。