KEY TO THE KNOWN SPECIES OF BENTROVATA RICHARDS, 1973 1. Frons without longitudinal stripes. Large, blunt, black thorns/pegs of ventro-medial process of synsternite unarranged (Figs 21–22). Pseudocerci large (Fig. 23). Female spermathecae long ovoid (Fig. 28), its neck without warts. Thorax contrastingly yellow. B. flavithorax sp. n. – Frons with 5 longitudinal stripes. Large, blunt, black thorns/pegs of ventro-medial process of synsternite in 1 row (Figs 31–32). Pseudocerci small (Fig. 47) or indistinct (Fig. 33). Female spermathecae pear-shaped (Figs 39–40, 53) 2 2. Body smaller, 1.55 mm. Male pseudocerci indistinct (Fig. 33). The black peg of surstylus comparatively short (Figs 34–35). Ventro-medial process of synsternite with 16 (8+8) pegs (Figs 31–32). Female unknown B. minor sp. n. – Body larger (1.60 mm or more). Male pseudocerci small (Fig. 47). The blunt peg of surstylus extremely long (Figs 49–50). Ventro-medial process of synsternite with long, blunt, black pegs in 1 row, with 20 (10+10) pegs (Figs 44–45) 3 3. Thorax dark brown. Legs predominantly dark brown. Neck of spermathecae with numerous warts (Figs 39–40). Male unknown B. nigrithorax L. Papp et Szappanos, sp. n. – Thorax contrastingly yellow. Legs predominantly yellow. Neck of spermathecae without warts or they are indistinct (Fig. 53) B. regalis Richards *

Published as part of Papp, László, 2021, New Species Of Apterobiroina L. Papp And Bentrovata Richards (Diptera, Sphaeroceridae) From Australia, pp. 101-117 in Acta Zoologica Academiae Scientiarum Hungaricae 67 (2) on page 116, DOI: 10.17109/AZH.67.2.101.2021, http://zenodo.org/record/4946023