Burnsiellus

Key to the species of Burnsiellus

1 Metacoxal plate strongly widening to the femoral insertion, about twice as wide at the medial edge as at the lateral edge (Fig. 31).................................................................................................. 3

- Metacoxal plate less strongly widening to the femoral insertion, about one and a half times as wide at the medial edge as at the lateral edge (Fig. 30)................................................................................... 2

2 Elytra purple-brown with black costae and small pulverulent white spots (Fig. 9); underside entirely 'metallic' reddish purple and blue-green; Queensland........................................................... B. albosparsa (Carter)

- Elytra straw coloured with brown patches and black costae (Fig. 7); underside largely 'metallic' purple-brown but anterior margin and lateral margin of prosternum yellow; W. Australia, S. Australia, Victoria.............. B. marmorata (Blackburn)

3 Elytral apices subtruncate, without well defined teeth (Fig. 28); elytra very densely almost contiguously punctured between the costae; pronotum strongly narrowing to the anterior and posterior angles (Figs. 10, 26); fronto-clypeus strongly depressed between the antennal insertions; mid tibia much broader than hind tibia, strongly swollen in male, with long tibial spurs which curve at the apex; posterior margin of 2nd visible ventrite simple (Fig. 12); apex of last visible ventrite truncate, without lateral teeth (Fig. 12), W. Australia, S. Australia, New South Wales ................................ B. trisulcata (Carter)

- Elytral apices obliquely truncate, with well defined teeth (Figs. 8, 29); elytra less densely punctured between costae; pronotum almost parallel sided (Fig. 8); fronto-clypeus only slightly depressed between the antennal insertions; mid tibia about as broad as hind tibia, not swollen in male, with shorter, straight tibial spurs; posterior margin of 2nd visible ventrite with a large semitransparent lobe at the middle, covering part of the 3rd ventrite (Fig. 11); apex of last visible ventrite slightly concave, with lateral teeth (Fig. 11); Victoria.............................................................. B. lobatum sp. n.