ORDER COLEOPTERA. 501 



that we must refer the lucane chevre of Olivier, or the L. 

 chevreuil of Fabricius. The Lucanus, thus designated by 

 Linnaeus, is a species of North America, and very distinct 

 from the preceding. 



L. caraboides, Lin. Oliv. Col. ibid. II. 2, five lines in 

 length, of a greenish brown, with the mandibles crescent- 

 formed, and the length of which does not exceed, even in 

 the males, that of the head.* 



In others, the eyes are divided transversely, and integrally 

 by the edges of the head. The jaws terminate in a shorter 

 and less narrow lobe than in the preceding, and often present 

 a corneous tooth at the internal edge. 



Platycerus, Latr. 



The palpi, the maxillary lobes, and the tongue, are pro- 

 portionally shorter than in the preceding sub-genera. The 

 mentum forms a transverse square, while in the preceding it 

 is often in a semicircle. It conceals on both sides the base 

 of the jaws. The mandibles are generally short.-f- 



The other Lucanides have the knob of the antennae com- 

 posed of the last seven articulations. 



Syndesus, Macl. Slnodendron, Fab. 



The corslet presents anteriorly a little horn, and in the 

 same manner as that of most of the passali, a furrow in its 



* To the Lucani I unite the ccriichus and platycerus of Mr. Macleay 

 The proportions of the mandibles of the palpi, of the maxillary lobes, of 

 the tongue, and the knob of the antennse, cannot furnish constant and 

 rigorous characters. 



f The Lucanus parallelipedus, of Fab., a species, forming with another, 

 the C. dorcus of Mr. Macleay. I again unite to the platyceri, the nigidius, 

 CEgus and Figidiis, of this learned entomologist. 



