Notes on Australian Coleoptera. 117 
ADELOTOPUS. 
Adelotopus Vicinus: length 2%’; very nearly allied to 
Hydroboides, but a narrower ; the thorax broader, and its pos- 
terior angles depressing more the base of the elytra; extremity 
of the latter and abdomen of the same shiny black as the 
rest of the body; palpi and legs of a reddish brown. 
Sydney. 
Adelotopus Paroensis: iength 6’; very nearly allied to 
Hydroboides and Vicinus, but distinct from both by its long, 
cylindrical form; the thorax is not broader than the elytra; 
the body is entirely covered with fine punctures, and its 
colour is of a shiny black; the parts of the mouth and the 
extreme terminal margin of the elytra and legs are of a 
brownish red. 
From the Paroo and Darling rivers, in the central parts of 
New Holland. 
Adelotopus Occidentalis: length 24’; of a shiny black, 
covered with fine punctures; thorax narrower than the 
elytra; the mouth, antenne, under side of the body, and 
legs of a brownish red. 
This sort is very nearly allied to Vicinus, but is of a more 
elongate form, with the thorax narrower. | 
Swan River. | 
Adelotopus Politus: length 3’; of a polished black; body 
rather depressed; thorax broader than long; marginated 
laterally, with its sides rather rounded; elytra rather nar- 
rower backwards than at their anterior part ; their posterior 
angles rounded; in some specimens a faint transverse line 
near the base; under side of the body, mouth, and legs, of a 
dark reddish brown. 
From Brisbane and the Clarence River. 
Note.—In some specimens, the lateral margins of the 
thorax have a bluish tinge. 
Adelotopus Punctatus: length 23’; of a dark brown, rather 
glossy ; entirely covered withadense puncturation; body rather 
depressed ; thorax transverse, with its lateral margins broad 
and of a reddish brown; a very faint transverse impression 
at, its posterior part; elytra almost parallel, with a brown 
margin; a very feeble sutural stria; under side of the 
body brown; parts of the mouth and legs of a dark red. 
From the Clarence River, in Dr. Howitt’s collection. 
Adelotopus Cornutus: length 3’; body long, cylindrical, of 
a glossy dark brown; head with two tubercles on the fore- 
