Notes on Australian Coleoptera. 107 
One single specimen in my collection, from the Paroo River, 
in the central parts of New Holland. 
Note.— This fifth sort is easily distinguished by its smaller 
size and its thorax almost entirely puncturated; Grandvs 
has the anterior margin of its thorax advanced and rounded 
in the middle, with its anterior angles obtuse; Titana and 
Longipennis have both the anterior margin of the thorax 
lightly emarginated, and the anterior angles advanced, but 
the first is constantly larger than the other, and its thorax 
is broader in its posterior part and less cordiform. Grandis 
is of all the one whose punctures are the finest. 
6. Gigadema Minuta: length 10’; of an opaque black ; 
covered with very strong punctures, more dense on the disk 
of the thorax than on any other part; head large; thorax 
broad, very short, with its sides rounded; elytra striated , 
inferior parts of the body punctured, but rather glossy ; 
antenne hirsute, except on the four first articles. 
Ipswich (Queensland) ; found by Dr. Howitt, to whom I 
owe a specimen. Since, I have received two more from Port 
Denison. : 
Note.—This insect is, perhaps, Mr. Hope’s Aingma 
Unicolor, but his description agrees equally with several 
other Hellwonide. : | 
7. Gigadema Thomsoni: length 12’; of a dull black; 
covered with a dense puncturation ; thorax broad, the sides 
rounded, but forming a sort of angle at their posterior and 
broader part; elytra covered with small punctures, and 
striated. 
From Port Denison. 
This sort is very much like the former, but the colour is 
more dull, the head is less impressed in front ; the thorax is 
more equally punctured, and has a different form; the elytra 
are not so deeply striated. 
Hellwosoma is another new form of Helluonide, which is 
distinguished by the presence of wings, the mentum armed 
with a tooth, and the head inflated laterally behind the eyes. 
The form is rather depressed, broader than in Gigadema, and 
the colour generally brilliant and metallic, often blue, as in 
Ajngma. Five sorts of this group are in my collection ; 
the head is rather large; the antenne rather long and 
cylindrical; the thorax strongly cordiform. 
Hellwosoma Ater: length 7’; black; very strongly punc- 
tured; antenne hirsute; thorax rather long, slightly im- 
pressed; elytra finely puncturated and striated ; inferior 
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