396 INSECTA. 



The genus Lissauchenus of Mac Leay, Jim. Annul. Javan., I, 

 j } l appears to me to differ but slightly from the preceding. 



The others, most commonly, have their mandibles very obtuse, or 

 as if truncated and forked, or bidentated at the extremity. Their 

 labrum is distinctly emarginate or bilobate, and the anterior portion 

 of the head from which it arises, is bordered and frequently concave. 

 There is no tooth in the emargination of the mentum. The tarsial 

 palette of several is broad and almost orbicular. 



The mandibles of these latter terminate in a point without any 

 tooth or emargination under it. 



The tarsial palette of the males is composed of the three first joints. 



REMBUS, Lat. 



The labrum bilobate ; exterior maxillary palpi filiform; last joint 

 of the labial palpi somewhat enlarged, and in the form of a reversed 

 and elongated cone. 



The head, in comparison with the width of the body, is narrow; 

 the antennae and palpi are slender*. 



, Bon. 



The labrum simply emarginate with an impressed longitudinal line 

 in the middle ; the last joint of the exterior palpi is the largest and 

 almost securiform. 



The body nearly forms a parallelepiped ; the head is almost as wide 

 as the thorax, and the elytra are strongly striated and frequently 

 carinated laterally. The mandibles are arcuated inferiorly on the 

 internal margin, and then as if truncated and terminated in a point. 

 The species known are from America f . 



Those have very obtuse mandibles, emarginate at their extremity, 

 or unidentate beneath. 



LICINUS, Lat. 



The last joint of the exterior palpi largest and almost securiform ; 

 tarsial palette of the males broad, suborbicular, and formed by the 

 two first joints, the first of which is very large J. 



BADISTER, Clair. AMBLYCHUS, GijlL 



Last joint of the exterior palpi oval ; that of the labial palpi merely 

 somewhat thicker, and frequently terminating in a sharp point; tar- 

 sial palette forming a long square, and composed of the three first 

 joints . 



* Rembus politus, Fab. ; Herbst., Archiv. XXIX, 2 ; R. impressus, Dej. ; Carab. 

 impressus, Fab. 



f See Dej. Spec. II, 283. They are the Die. chalybaus, cilternans, furvus (D. 

 elongatus, Say), simplex aud politus all, I believe, that have as yet been ascer- 

 tained. 



J Carabus agricola, Oliv., Col. Ill, 35, V, 53 ; C. silphoides, Fab. ; Sturm, III, 

 Ixxiv, a; C. emarginatus, Oliv., Ib., XIII, 150 Carabus cassideus, Fab. ; C. de- 

 pressus, Payk. j'Sturm, Ib., LXXIV, o, O ; C. Hoffmanseggii, Panz. Faun. Insect. 

 Germ., LXXXIX, 5. See Spec. Dej. II, p. 405 411. 



Carabus bipustulatus, Fab. ; Clairv., Entom. Helv. II, xiii ; C. peltatus, Illig. : 

 Panz. Ib. XXXVII, 20. See Spec. Dej. II, p. 405411. 



