ORDER COLEOPTERA. 217 



a smooth space, and without a posterior edge well terminated. 

 Such is the character which appears to me the best to signalize 

 the genus Fergus of M. Bonelli. Neither the relative 

 length of the two last articulations of the maxillary palpi, 

 nor the inequality of the proportions of the mandibles, nor 

 some slight sexual differences taken from the last rings of 

 the abdomen, distinguish it clearly from the other sub-genera. 

 These species exclusively inhabit Spain, Italy, and the larger 

 islands of the Mediterranean. Some are flatted above.* 



Myas, 



Of M. Ziegler, resemble the Feroniae, with which has been 

 formed the genus cheporus ; but their corslet is more dila- 

 ted laterally, narrowed near the posterior angles, and pre- 

 sents immediately in front of them a small emargination. 

 The labial palpi are terminated by an articulation evidently 

 thicker and almost triangular. Two species are known, one 

 of Hungary {chalyhceus)^ and the other of North Ame- 

 rica, where it has been discovered by M. Leconte.-f- 



Sometimes the mandibles are as long as tlie head, and 

 advance strongly beyond the chaperon. The body is always 

 oblong, with the corslet in the form of an elongated heart ; 

 some resemble the scarites, and others the Lebia. 



» Carahus PaykuUi, Ross, Faun. Etrusc. Mant. ]. Tab. V. f. C. Percus 

 Ebenus, Charp. Hor. Entom. V. I. See also the Annals of Natural 

 Sciences, and those of the Physical Sciences, by M. M. Bory St. Vincent, 

 Drapier, and Van-Mons. I refer to the same sub-genus, the Abax Corsi- 

 CHS of M. le Comte Dejean. 



f Some other species, analogous in the fonii of the labial palpi, but 

 with stronger mandibles, of which the middle tooth of the mentum is 

 much larger, and proper to the East Indies, form the genus Trigonotoma, 

 of M. Dejean, whose characters are given in the third volume of his sjiecies. 

 Here, again, it would seem proper to place the genus, pseudomorpha, of 

 M. Kirby(Lin. Trans. XIV. 98.). 



