440 INSECTA. 



which are at the end and divei-ge, the other is in the inner side, 

 all furnished with small ones. The females, called Does, have a 

 narrower head and much smaller mandibles. It flies at night 

 in the heat of summer. Its size and mandibles vary. It 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 Linnaeus, is a species from North America, and very 

 distinct from the preceding. 



L. caraboides, L.jOliv., 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(l). 



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. 



Platyoerus, Lat. 



The palpi, maxillary lobes, and ligula are proportionally shorter 

 than in the preceding subgenus. The mentum forms a transversal 

 square, while in the preceding it is frequently semicircular. It con- 

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

 short(2). 



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(3). 



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 



fl ) I unite the Ceruchus and Platycerus, Mac Leay, with Lucanus. The pro- 

 portions of the mandibles, palpi, maxillary lobes, ligula and club of the antennae, 

 do not furnish constant and rig-ordus characters. 



(2) The Lucanus paralklipedus of Fabricius, forming, with another species, the 

 genus Dorcus of Mac Leay. T also unite to Platycerus the Nigidius, Mgus, and 

 Figulus of the same learned entomologist. 



(3) Synodendron cornutum. Fab.; Donov., Insect, of New Holl., tab. I, 4; Syn- 

 desus comutus, Mac L-, Hor. Entom. I, p. 104. 



