Anal angle of the wing not projecting, but weakly developed if at all; R₄ and R₅ may be fused throughout forming one vein (fig. 18), or branch toward the apex in the manner typical of the family (fig. 9); cell 1st M₂ may be narrowed apically owing to the elongated m—cv being more or less parallel to the posterior margin of the wing; or triangular, m—cv being almost in line with the first section of M₂; or rectilinear when the sides are practically parallel, M₁ and M₂ being fused for some distance before separating to the margin (fig. 9). There is also a considerable variation of the cell Cu; 1st A may be absent or represented by only a faint impression, although Cu₂ is distinct and curves down to meet it (fig. 18).