Key to tribes of Isometopinae from India and Sri Lanka

1 Tarsi three segmented. Total length between 5.5 and 7 mm. Pronotal callosities distinct, separated by a deep incision..................................................................................... .. Gigantometopini Herczek

- Tarsi two segmented. Total length always less than 3.5 mm .................................................... 2

2. Second antennal segment globose or laminate................................. Sophianini Yasunaga, Yamada & Tsai

- Second antennal segment cylindrical or almost cylindrical......................................................3

3. Body shape oval. Clavo-corial sutures generally not parallel to scutello-claval sutures; the clavus frequently narrowed apically, tapering from base to apex, extending to the apical part of the scutellum or slightly beyond the apex; claval suture absent or short, at most much less than half of scutellum length. Scutellum usually elongate, long as or longer than wide................................................................................................. Isometopini Fieber

- Body shape elongate-oval to elongate. Clavo-corial sutures almost parallel to scutello claval sutures; the clavus not or slightly widened posteriorly, always obviously produced beyond tip of scutellum; claval suture elongate, half as long as to equal the length of the scutellum. Scutellum usually wider than long.................................... Myiommini Bergroth