The Book of the Fly / A nature study of the house-fly and its kin, the fly plague and a cure

by George Hurlstone Hardy

V, c (or C).—The Costal Vein, or Costa, bounding the front Margin.

V, c1a.—Part of the Costa (often ciliated and spined) reaching to the end of V, 1a.

V, 1a.—The upper branch of the V, 1.

V, 1b.—The lower branch of the V, 1.

V, 2.—Second (longitudinal) Vein.

V, 2b.—Lower branch of V, 2.

V, 3.—Third or Cubital Vein.

V, s.—The "Vena Spuria," a thickening of the wing (characteristic of Syrphidæ), an imperfect V between V, 3 and V, 4 crossing X, 4.

V, h.—A "Hang" V (or Appendix) a more or less irregular incomplete V.

V, 4.—Fourth Vein, often much branching.