Bentrovata flavithorax sp. n.

(Figs 21–29)

Holotype male (HNHM): WESTERN AUSTRALIA, Gully Rd., Nornalup-Walpole Nat. Pk. – 25. 1. 1979 to 6. 3. 1979, No. 1496, pitfall traps .

Paratypes (HNHM, 2 m, 3 f in AM): 5 males 8 females (1 m 1 f gen. prep.): same as for the holotype; 3 males 6 females (HNHM): ibid., Nornalup-Walpole Nat. Pk., No. 1495; 1 female (HNHM): ibid., Treen Brook S. F., No. 1492 .

Body length (mm): 1.58 (holotype), 1.66–1.81 (paratypes).

Frons without longitudinal stripes. Thorax contrastingly yellow.

Male genitalia. Larger blunt black thorns/pegs of ventro-medial process of synsternite are unarranged (Figs 21–22). Dorsal part of synsternite short (Fig. 24). Pseudocerci large (Fig. 23). Hypandrium Y-shaped, with long apodeme (Fig. 25). Surstylus (Fig. 26) short, with an extremely large black thorn ventrally. Distiphallus (Fig. 27) rather short; postgonite long and narrow, with a proclinate, nearly sharp apex.

Female genitalia. Abdomen at broadest 0.60 mm. Length of tergites 3–5 (mm): 0.225, 0.36, 0.225. Length/width of sternites 3–6 (mm): 0.12×0.67, 0.17×0.68, 0.12×0.66, 0.09×0.41. Epiproct membranous, without setae (Fig. 29). Spermathecae long ovoid (Fig. 28), neck of spermathecae without warts.