COLEOPTERA. 391 



Mysa, Zieg. 



These Insects resemble the Feroniae which constitute the genus 

 Cheporus, but their thorax is more dilated laterally, and narrowed 

 near its posterior angles, immediately before which is a little emar- 

 gination. The labial palpi terminate in an evidently thicker and 

 nearly triangular joint. 



Two species are knoAvn, one from Hungary, the M. Chaly- 

 bcEus, and the other from North America, where it was disco- 

 vered by Major Le Conte *. [The M. cyanescens, Dej. — Eng. 



Sometimes the mandibles are as long as the head, and extend con- 

 siderably beyond the clypeus. The body is always oblong, and the 

 thorax in the form of an elongated heart. Some of them resemble 

 Scaritides amd others Lebise. 



Cephalotes, Bon. — Broscus, Panz. 



Length of the antennse almost equal to half that of the body; their 

 joints short, the first shorter than the two following ones taken 

 together; the right mandible strongly unidentated on the internal 

 side ; labium entire f 



Stomis, Clairv. 



The antennae longer than the half of the body, and composed of 

 elongated joints, the first of which is longer than the two following 

 ones taken together ; the middle of the internal side of the right 

 mandible deeply notched ; the labrum emarginate '\.. The following 

 subgenus 



Catascopus, Kirby, 



Is distinguished from the two preceding subgenera, to which it 

 otherwise approximates in the relative length of the third joint of 

 the antennae, by the flatness of the body, by being proportionably 

 wider, with a shorter thorax, by the elytra being strongly emarginate 

 laterally at their posterior extremity, and by the elongation of the 

 labrum. The eyes are larger and protuberant. These are ornamented 



Hor. Entoin. V, i. See also the Ann. des Sc. Nat. and Ann. des Sc. Phys., of MM. 

 Bory de Saint-Vincient, Drapiez and Van-Mons. I refer the Abax corsicus, Dej., to 

 the same subgenus. 



* Other species, analogous in the form of their labial palpi, but with stouter man- 

 dibles, in which the tooth of the mentum is much larger, and peculiar to the East In- 

 dies form the genus Triyonomota of Count Dejean, the characters of which are given 

 in the third volume of his Species des Col^opt^res. Here also should be placed the 

 genus Pseudomorpha of Kirby, Lin. Trans. XIV, 98. 



t Carabus cephalotes, Fab. ; Panz., Faun. Insect. Germ., LXXXIII, 1 ; Entom. 

 Ind., p. 62. 



X Stomis pumicatus, Clairv. Entom. Helv. II, vi. 



