Many species of Emeralds can be identified to family by their bright green metallic eyes or the metallic emerald sheen of their thorax
Does the specimen have a thin white ring between segments 2 and 3, a spiked epiproct and a cross vein in the forewing triangle?
Is the specimen smaller than most emeralds, with a wide, irregular yellow ring between segments 2 and 3, and a clubbed abdomen ?
Does the specimen have a pattern, on the thorax, of brown and metallic green, with yellow or white spots ?