Two branchial opercula: tracheal opercula absent.
Dimensions.
| Lines. | ||
| Length of | cephalothorax | 4 |
| „ | abdomen to the first bend of the appendage | 12 |
| „ | appendage from its first bend | 10 |
| „ | falces | 1⅓ |
| „ | palpus | 4⅓ |
| „ | terminal joint of palpus | 1⅔ |
| „ | first leg | 16 |
| „ | second leg | 16 /3 |
| „ | third leg | 9 |
| „ | fourth leg | 10½ |
Colour brownish yellow: extremities of the legs and of abdominal appendage and sternum blackish brown: upper parts of the abdomen yellow: two black bands round the femur of the first leg.
A single female specimen of this spider was obtained by the late M. Mouhot in the Lao Mountains of Cochin China. Its form is so extraordinary that we have not hesitated to refer it to a new genus, Cyphagogus.
DESCRIPTION BY M. LE COMTE DE CASTELNAU OF A NEW AND GIGANTIC CARABIDEOUS INSECT DISCOVERED BY M. MOUHOT IN LAOS.
(Communicated by the Count to the ‘Revue et Magasin de Zoologie.’ 1862. No. 8. Paris.)
GIGANTIC CARABUS.
Among the magnificent insects that M. Mouhot collected during the few months of his stay in Laos, the first place is claimed by the beautiful Carabus which forms the subject of this paper, and which I have named Mouhotia gloriosa after my unfortunate countryman.