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

47 (52). Alulæ absent or rudimentary.

48 (51). Apex of the wing rounded.

49 (50). X, 4 placed generally beyond X, 5¹, at most only a little before it; V, 5 with 2 X-veins bounding a discal cell (plate V, 11); or, if only one, then X, 5 is placed before, or, at most (plate V, 12) only a little beyond X, 4.

Part of Empidæ, XXIII

50 (49). X, 4 placed very near the base of the wing; V, 5 with only one X-vein placed far beyond X, 4; no discal cell (plate V, 14, 15).

Part of Dolichopodidæ, XXIV

51 (48). Apex of the wing (plate V, 16) pointed.

Lonchopteridæ, XXV

52 (47). Alulæ present.

52-1/2 (1-1/2). Frontal lunule (plate VII, 5) present.