36 INSECTA. 



is to one of these varieties that we must refer the Lucane chevre 

 of Olivier, or the L. capreolus of Fabricius. The Lucanus, so 

 called by Linnseus, is a species from North America, and very 

 distinct from the preceding, 



L.carab aides. It.; Oliv., Col., lb., II, 2. Five lines in length; 

 greenish brown; mandibles crescent-shaped, and not surpassing 

 in length that of the head, even in the males*. 



There, the eyes are entirely and transversely divided by the edges 

 of the head. The maxillae are terminated by a shorter and narrower 

 lobe than in the preceding Insects, and frequently present a corneous 

 tooth on the inner margin. 



Platycerus, Lat. 



The palpi, maxillary lobes, and ligula are proportionally shorter 

 than in the preceding subgenus. The mentum forms a transversal 

 square, Avhiie in the preceding it is frequently semicircular. It 

 conceals the whole base of the jaws. The mandibles are generally 

 short f. 



The club of the antennae in the remaining Lucanides is composed 

 of the seven last joints. 



Syndesus, Mac L. — Sinodendron, Fab. 



A small horn on the anterior of the thorax, which is also, as in 

 most of the Passali, marked with a median sulcus. Its separation 

 from the abdomen is also more strongly marked than in Lucanus. 

 The two posterior legs are placed further behind. The antennae are 

 less geniculate J. 



The Lucanides of our second section have their antennae simply 

 arcuated, or but slightly geniculate and pilose ; the labrum always 

 exposed, crustaceous, and transversal; the mandibles strong and 

 much dentated, but without any very remarkable sexual difference; 

 the maxillae entirely corneous with at least two strong teeth; the li- 

 gula equally corneous or very hard, situated in a superior emargina- 

 tion of the mentum, and terminated by three points; the abdomen 

 pediculated, presenting the scutellum above, and separated from the 

 thorax by a strangulation or considerable interval. They form the 

 genus 



Passalus, Fab. 



Restricted by M. Mac Leay to those species in which the club of the 



* I unite the Ceruchtis and Plati/ccrus, Mac Leay, with Lucanus. The propor- 

 tions of the mandibles, palpi, maxillary lobes, ligula and club of the antennae, do not 

 furnish constant and rigorous characters. 



f The Lucanus parallelipedus of Fabricius, forming, with another species, the genus 

 Dorcus of Mac Leay. I also unite to Platycerus the Nigidius, JEgus, and Figulus 

 of the same learned entomologist. 



X Synodendron cornutum, Fab.; Donov., Insect, of New HoU,, tab. 1.4; Syri' 

 desus cornutus, Mac L., Hor. Entom. I, p. 104. 



