Intersection of vein R1 with vein C, distance between apices of veins R1 and R2+3 and apices of veins R2+3 and R4+5+M1 and setosity of anterior ventral half of vein C before crossvein h. A Matsumyia sp. B Sphecomyia weismani C Criorhina bubulcus (Walker, 1849).