Inner wall of antennal sockets not dorsally produced; parafrontal carina absent (Fig. 159, M46); notaulices present (Fig. M49, M50) or absent ; T2 anterioraly without (Fig. M56, M58) a blunt median process (p. 31)
Diphoropria
Inner wall of antennal sockets dorsally produced (Fig. 176); parafrontal carina present (Fig. M63, M65); notaulices absent (Fig. M68, M70); T2 anteriorly with (Fig. M82, M85) or without (Fig. M67) a blunt median process (p. 37)