cylindrical basitarsus

partial scopa present on sterna 2-5 or 3-5 that forms bands of long hairs that are interrupted medially

basal vein strongly arched and especially so towards its base

prepalpal part of the galea tapered to a point and overlapping at least half of the stipes

posterior surface of the prementum bear a large flat area covered with short hairs or scales generally of uniform length and appearing felt-like