Complex sentence: It is the largest of the European "Lestes" with a dark metallic green body and in the field it can be identified as, in mature specimens, there is a blue pruinescence on the thorax and the base of the abdomen in both sexes.
Split into simpler sentences: It is the largest of the European "Lestes" with a dark metallic green body. In the field it can be identified in th efield as there is a blue pruinescence on the thorax and the base of the abdomen in both sexes.