Pyralis farinalis

Pyralis farinalis (Linnaeus, 1758)

Image (Fig. 2a): The larvae feed on stored grain and live. The wingspan of the adults is 23mm. There are reddish-brown zigzag bands at the tip and end of the forewings of this reddish-brown moth. The medial area is light brown or yellowish while the costal and post-median areas are brownish-red in colour. They are separated from each other by a white band. The outer antemedial white stripe is curved. Fore and rear wings have fringes.

Tympanal organ (Figs. 3a, 4a): Bulla tympani is closed, round, and the inner edge is usually concave on the front. The praecinctorium, is undeveloped. The tympanum and conjunktivum are on the same plane. The pons tympani is thin and shaped like a needle, and it is usually elongated beyond the back edge of the first tergite. The fornix tympani is thick and elongated in the shape of a triangle downwards. The processus spiniforme is curved and at the head of bulla tympani. The intersegmental thoraco abdominal membrane is U-shaped.