310 • INSECTA. 



rous. They constitute a particular section, the sixth of the genus, 

 which we will name the Grandipalpi(1).« 



A first division is thus characterized: the body always thick and 

 apterousj labrum always bilobatej last joint of the exterior palpi 

 always very large; emarginalion of the meiitum edentate; internal 

 side of the mandibles entirely (or nearly so) dentated throughout 

 its length. 



Here, the mandibles are arcuated, strongly dentated throughout 

 their length, and the lateral and exterior extremity of the two first 

 tibice is prolonged into a point. The last joint of their exterior palpi 

 f»rms a longitudinal semi-oval with the internal side arcuated; the 

 internal maxillary palpi are straight; their last joint is much larger 

 than the first, and almost ovoid. The mentum is profoundly emar- 

 ginate. Such are the characters of 



Pamborus, Lat. 



Of which but a single species, the P. alternans, Cuv. Reg. 

 Anim. V, xiv, 2; Dej., Spec. II, p. 18, 19, is yet known. It 

 was brought from New Holland by Messrs Peron and Lesueur. 



There, the mandibles are straight, simply arcuated, or hooked 

 and dilated at the. extremity. The lateral extremity of the two an- 

 terior tibiae is not prolonged into a spine. The last joint of the 

 exterior palpi is much larger than the preceding ones and concave 

 above, almost in the form of a spoon. The mentum is deeply emar- 

 ginate, longer in proportion than in the following subgenera, thick- 

 ened on the sides in most of them, and as if longitudinally divided 

 into three spaces. The elytra are soldered, carinated laterally, and 

 embrace a part of the sides of the abdomen. These Carabici com- 

 pose the genus Cychrus of PaykuU and Fabricius, since modified as 

 follows: 



Those in which the tarsi are similar in both sexes, the thorax is 

 cordiform and truncated, narrower posteriorly, or almost orbicular, 

 and not raised along the sides, with the posterior angles null or 

 rounded, alone retain the generic denomination of 



Cychrus, Lat. Dej.(2) 

 Those, in which the three first joints of the anterior tarsi of the 



(1) A more characteristic denomination than that of Abdominales which we 

 formerly gave them. 



(2) Cychrus rostratus. Fab.; Panz. Faun. Insect Germ., LXXIV, 6; Clairv., En- 

 tom. Helv., II, xix. A; — C. attenuatus. Fab.; Panz., lb. II, 3; Clairv. lb., xix, B; — 



