棕色、黑色或深橄榄绿，某些亚科的物种会在其边沿带有金黄色的条状斑纹。 They have short, but sharp s. Immediately upon biting, they deliver digestive enzymes. The幼体e are commonly known as water tigers. The family includes more than 4,000 described 物种 in numerous 属.
幼虫及其发育.When