86 AUSTRALIAN SCARITIDA. 
Specirs IX.—Carenum™® sumptuosum, Hope MS. (Plate 22, fig. 1, and 1 a, 1 b, and 1 c.) 
C. angustius nigrum, igneo colore varium, elytris levibus punctis duobus versus basin 
alterisque duobus subapicalibus, tibiis antice externe bidentatis. Long. corp. lin. 10; 
lat. elytr. lin. 3. Mus, Hope. (Inhabits Port Essington, on the north coast of New 
Holland. ) 
This is the most splendid Scaritideous insect hitherto discovered. It is of a much narrower 
form than any of the preceding species. The head is broad, the middle and fore margin of the 
upper side blue-black, with a fiery copper-coloured patch on each side changing to green ; the 
narrow hind part of the head is also fiery copper-coloured. The crown of the head has two 
deeply-impressed simple lines much diverging behind, where each unites with another 
impressed line margining the eyes. The labrum (fig. 1 a) has the middle lobe prominent. 
The right mandible has four teeth, the first and second distant, with a minute tubercle 
between them, and the third tooth is small. The left mandible has three teeth, the middle 
one being small. The pronotum is about as broad as long, with the hind angles and the 
middle of the hind margin somewhat emarginate; the disc is blue-black, with an impressed 
line, but each side, and behind, is coloured with igneous copper, margined with golden- 
green, which colours extend inwards from the front angles to a point, The elytra are 
elongate subcylindric, with the suture deeply impressed, the anterior angles rounded off, the 
disc smooth, with two deep punctures near the base and apex; they are of a similar igneous 
copper-colour, margined with green, having a large blue-black central patch ; within the lateral 
margins of the elytra are a series of small elevated punctures. The legs are short, with the 
fore tibia externally bidentate. The head beneath, and two patches on each of the abdominal 
segments, are coppery and golden-green. 
Species X.—Carenum megacephalum, Hope, MSS. (Plate 22, fig. 3, and 3a). C. cylin- 
dricum nigrum nitidum, capite maximo, pronoto viridi, elytris levibus cupreo-viridibus, 
tibiis anticis dente unico apicali externo. Long. corp. lin. 8, lat. elytr. lin. 14. Mus. 
Hope. (Inhabits Port Essington. ) 
This species is remarkable for the large size of its nearly square head, of a shining black 
colour, with a deeply-impressed short line on each side, running from the anterior angle 
towards the crown, and with a circular impression on each side between the eyes; behind 
which the head is suddenly contracted into aneck; the mandibles have three or four not 
yery strong and irregular teeth; the labrum is deflexed in front (fig. 3 a), its free margin 
being produced in the centre and slightly notched; the outer maxillary palpi are scarcely 
longer than the inner ones, rather thick, with the last joint very short and triangular; the 
mentum and labial palpus is like that of C. gmmatum. The antennez are rather long, with 
the terminal joints slightly compressed, the terminal joint being longer than any of the 
preceding. The pronotum is considerably longer than broad, the sides parallel in front, but 
narrowed off behind; it is cylindrical, and of a bright green colour, with a slight dorsal 
impressed line. The elytra are narrowed in front, gradually but slightly increasing in breadth 
nearly to the tips. They are of a splendid coppery green, with the suture much depressed, 
the sides margined, the disc smooth ; close to the base are a few punctures, forming a small 
oblique line. The legs are short and black, the fore tibia having only a long single apical 
spine on the outside, a slight bulging out of the edge of the limb indicating the situation of 
the second ordinary spine. 
Species XI.—Carenum tinctilatum. (Plate 22, fig. 2.) C. cylindricum nigrum, elytris 
lateribus ceruleis, punctisque duobus subapicalibus, tibiis anticis extus bidentatis. Long. 
corp. lin. 8, lat. elytr. lin. 2. Mus. Entomol. Club. 
Syn.—Hutoma tinctilatus, Newman. Ent. Mag. 5,171. 
This is the most regularly cylindrical species of the genus. It is of a shining black colour, 
with the margins of the elytra brilliant blue. The head has two deep channels on the crown 
posteriorly diverging, and anteriorly furcate, with a minute puncture in the fork. The 
anterior angles of the head are obliquely truncate, and behind the eyes the head is gradually 
narrowed into a neck ; the antenne are considerably longer than the head, being about equal 
to it and the mandibles in length ; the terminal joints are compressed and gradually dilated, 
the terminal joint being the largest and oval. The clypeus terminates in two small central 
and two large lateral teeth, the labrum being deflexed and not visible from above. Each 
mandible has three obtuse teeth in the middle. The maxillary palpi have the terminal joint 
but slightly securiform ; the terminal lobe of the maxille is not furnished with an apical 
curved tooth. The labial palpi have the terminal joint securiform. The pronotum is smooth, 
with the front’margin straight ; the sides are also parallel for about two-thirds of the length of 
the pronotum ; they then become gradually narrowed and rounded off, the lateral and hind 
