Veins R₄₊₅ and M are the longitudinal veins that end near the apex of the wing. Vein R₄₊₅ ends slightly anterior to the wing apex. Vein M ends slightly posterior to the wing apex and its apex is anteriorly curved to varying degrees in most species of Anastrepha. Cell r₄₊₅ lies between these veins. The amount of curvature of vein M is indicated by the ratio of the width of cell r₄₊₅ at its apex divided by its width at crossvein dm-cu. The former is measured from the apex of vein R₄₊₅ to that of vein M (where M reaches the wing margin), and the latter is measured directly anterior to vein dm-cu.