COLEOPTERA. 3$ 



but slightly elevated, particularly in the females. The labrum is 

 concealed, the anterior tibiae are narrow and without a palette. The 

 palpi and lobes of the ligula are more elongated. 



Ryssonotus, Mac L. 



The mandibles of the males, as in Lamprima, forming a vertically 

 compressed, angular and dentated forceps*. 



Pholidotus, Mac L. — Chalcimon, Dalm. — Lamprima, Schoenk. 



Where the mandibles in the same sex are very long, narrow, arcu- 

 ated, terminated in a hook curved downwards and securiform on the 

 inner side. 



The club of the antennae formed by the three last joints is less pec- 

 tinated than in the others, and almost perfoliaceous. The mentura 

 covers the maxillae f . 



In the following subgenera the mesosternum does not project. 

 The head is as wide as the thorax or (in various males) wider. The 

 mandibles are glabrous, or at least without a tliick down on the inner 

 side. The body is always flattened. 



Here, the eyes are not cut transversely by the margin of the head; 

 the maxillae are terminated by a very slender penicilliform lobe with- 

 out corneous teeth. 



LucANUs, Lin, 



The digestive canal of the true Lucani is much less elongated than 

 that of the Scarabaeides, but the oesophagus is much longer. The 

 male organs of generation also differ greatly from those of the pre- 

 ceding Insects, the testes being formed by the circumvolutions of a 

 spermatic vessel, and not by an agglomeration of seminal capsules. 

 The adipose tissue, which almost disappears in the Scarabaeides, is 

 here abundant and disposed in clusters, which converge to the median 

 line. 



The larva of the L. cervus, which inhabits the interior of the Oak 

 for several years previous to its final metamorphosis, is considered as 

 the Cossus of the Romans, or that verminiform animal which they 

 regarded as a delicious article of food. 



L. cervus, L.; Oliv., Col, I, i, 1; Roes., Insect. II; Scarab., I, 

 iv, V. The male two inches in length, and larger than the fe- 

 male; black, with brown elytra; head wider than the body; 

 mandibles very large, arcuated, with three very stout teeth ; two 

 of which are at the end and diverge, 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 



* Lucanus nebulosus, Kirb., Lin. Trans., XII, xxi, 12; Mac L., Hor. Entom., I, 

 p. 98. 



f Lamprima Humboldii, Scbornh. ; Chalcimon Humboldii, Dalm., Ephem. Entom., 

 I, p. .3; Pholidotus lepidosus, Mac L., Hor. Eatom., I, p. 97, the male; Cassignetus 

 geotrupoides, ejusd., the female. 



