This splendid insect is black, with a large border of flame-colour at the sides of the thorax and of the elytra; this is covered with longitudinal striæ, formed by a double row of punctures. The thorax is hollowed behind, smooth on the top, with the lateral border a brilliant coppery-red; it presents a small longitudinal stria in the middle of its disk, and the anterior angles are very prominent.
It much resembles Pasimachus and Emydopterus, but is distinguished from them; firstly, by the maxillary palpi, of which the last joint is broad, flat, angular on the inner side, and rounded at the end, this joint being a little longer than the one before it; secondly, by the labrum, which is wide, short, and indented on the exterior side; and thirdly, by the labial palpi, which have their last joint in the same form as the maxillary, but longer and hatchet-shaped. The mandibles are very strong, moderately arched, striated transversely, and with a strong tooth on the inner side; the jaws are also striated and obtuse at the ends. The head is similar to that of Pasimachus, the thorax is heart-shaped, the elytra oval, with angles towards the joints not strongly marked, convex, and a little serrated behind; the claws are powerful, with a strong tooth on the outer side of the middle of the tibiæ of the centre pair.
This insect is one of the most magnificent Carabidæ known, and is nearly two inches in length. The collection in the British Museum contains a fine specimen of it.
DESCRIPTIONS OF TWO NEW SPECIES OF LAND-SHELLS DISCOVERED BY M. MOUHOT IN THE INTERIOR OF CAMBODIA.
Helix cambojiensis.
LAND-SHELLS.
Shell sinistral, deeply umbilicated, conoidly globose, rather inflated; upper portion of the whorls of a rich-toned transparent chestnut colour, edged at the satural margin with purple black; lower portion of the whorls white, turning to a delicate straw-colour by the overlying of a shining, transparent, horny epidermis, encircled below the periphery and around the umbilicus with two very decided, broad, rich purple black bands; whorls six, corrugately puckered throughout at the satural margin, the first four whorls very densely granosely wrinkle-striated in the direction of the lines of growth, the striæ gradually disappearing on the fifth whorl; aperture lunar-orbicular; lips simple, reflected partly round the umbilicus.
