208 Mr. G. R. Waterhouse's Description 



its antennae are long, and instead of being thick at the base and 

 gradually attenuated towards the apex, as in Carahus, are incras- 

 sated in the middle ; the third joint of the antennae is longer than 

 in Carabus, and is indeed nearly equal to the fourth and fifth taken 

 together, the terminal joint is short. The head is large, and but 

 little narrower than the thorax, which is cordiform, truncated 

 before and behind, has the anterior and posterior angles rounded, 

 an extremely faint dorsal channel, and a smooth and glossy upper 

 surface ; its greatest width is near the fore part, and behind it is 

 considerably contracted. The elytra are ample, depressed, rounded 

 at the apex, broadest in the middle, and somewhat suddenly con- 

 tracted near the thorax : they are rather delicately punctate- 

 striated, and punctures are observable between the third and fourth, 

 and seventh and eighth, striae ; these punctures are confluent with 

 those of the striae, and divide the interspaces of the striae, where 

 they occur, into small compartments like the links of a chain, as 

 observable in very many of the true Carahi. The region of the 

 suture is somewhat raised, and there is a slightly elevated but 

 broad ridge running parallel with, and at a little distance from, 

 the outer margin of each elytron. The striae of the elytra are 

 very close together, and so are the small punctures of which these 

 striae are composed — they are less deep than in Carahus monilis. 

 The legs are much longer than usual in Carahus proper, and the 

 femora of all the legs (more especially those of the anterior pair) 

 are stout : the tibiae of the anterior legs are considerably dilated 

 at their apex, and present a concavity on the under side of this 

 portion : those of the hinder legs are densely clothed with velvet- 

 like hairs on the innerside of the apical half, and the four basal 

 joints of the anterior pair of tarsi are provided with velvet-like 

 cushions on the underside.* The maxillary palpi are unfortu- 

 nately imperfect ; the terminal joint of the labial palpi is trun- 

 cated, but not dilated at tlie extremity as in Carahus. 



By those Entomologists who regard Procrustes and Procerus as 

 genera, the present insect would no doubt be also considered as 

 constituting a genus, but as the nature of the characters which 

 serve to separate these minor groups from Carahus I cannot think 



* The fact thai in Cambus proper, as well as Procerus and Procrustes, the 

 females are distinguishable, among other characters, by the absence of these 

 velvet-like pads, leads us to suppose the present insect is a male; and if so, 

 the anterior tarsi not being dilated, furnishes an additional distinguishing character 

 between the present sub-genus and Carabus. In the male Procrustes there are 

 but three of these padded joints. 



