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NEW SPECIES OF AUSTRALIAN COLEOPTERA, 
I have but a single specimen which, though a female, I have 
described, as its large size — in comparison with those species 
possessing a black prothorax — should render it distinct. 
Helcogaster concaviceps, n.sp. 
Depressed, shining. Black; head (except at base), pro- 
thorax, femora (except apex of posterior), and two basal joints of 
antenna?, red; elytra dark steel-blue (almost black); nine apical 
joints of antenna?, four posterior tibia?, all the tarsi, and the palpi, 
piceous-black; trochantins reddish-brown, their bases lighter, 
posterior femora tipped with piceous, anterior tibia? reddish, their 
bases darker; eyes dark brown. Head, prothorax, and elytra 
with long blackish hairs at the sides, the latter with a few on the 
disk, the last two with a few small hairs; abdomen with a few 
longish hairs at the apex; above with sparse minute pubescence, 
undersurface more sparsely still; meso- and metasternum with a 
few short hairs, tibia 1 with minute whitish pubescence, and a few 
straggling hairs. Head rather densely, and minutely punctate; 
prothorax minutely punctate, most noticeable at apex; elytra 
irregularly, abdomen above minutely, undersurface more sparingly 
punctate; meso-, metasternum and legs minutely but distinctly 
punctate. 
Head transverse; two wide and deep excavations between the 
eyes, an indistinct carina separating them; eyes small, moderately 
prominent; antenna? slender, not reaching base of elytra, equi- 
distant at their bases with the front of the eyes, 1st joint almost 
as long as 2nd-4th combined, 11th one and a half times as long 
as 10th. Prothorax longer than wide, apex slightly rounded, 
base truncate, angles equally rounded, sides and base very 
narrowly margined, sides subparallel; an indistinct longitudinal 
impression on each side in front, and a broad transverse one at 
the base. Scutellurn almost concealed by the prothorax, the part 
which is visible widely transverse. Elytra about as long as 
head and prothorax combined, much wider than prothorax, and 
wider than head across eyes, base truncate, shoulders square, the 
sides dilating to about the basal fifth, each separately rounded. 
