COLEOPTERA. 35 
but slightly elevated, particularly in the females. The labrum is 
concealed, the anterior tibize 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 *. 
Puoumwotus, Mac L.—Cuarcimon, Dalm.—Lamrrima, Schenh. 
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 antennz formed by the three last joints is less pec- 
tinated than in the others, and almost perfoliaceous. The mentum 
covers the maxille 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 thick down on the inner 
side. The body is always flattened. 
Here, the eyes are not cut transversely by the margin of the head; 
the maxille 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 Scarabzides, but the cesophagus is much longer. The 
male organs of generation also differ greatly from thase 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 Scarabeeides, 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; Rees., 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. 
+ Lamprima Humboldii, Scheenh.; Chalcimon Humboldii, Dalm., Ephem. Entom., 
I, p. 3; Pholidotus lepidosus, Mac L., Hor. Entom., I, p. 97, the male; Cassignetus 
geatrupoides, ejusd., the female. 
