36 INSECTA. 
is to one of these varieties that we must refer the Lucane chévre 
of Olivier, or the L. capreolus of Fabricius. The Lucanus, so 
called by Linnzeus, is a species from North America, and very 
distinct from the preceding. 
L. caraboides, L.; Oliv., Col., Ib.,U,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 maxillee are terminated by a shorter and narrower 
lobe than in the preceding Insects, and frequently present a corneous 
tooth on the inner margin. 
Piatycervs, 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 
conceals the whole base of the jaws. The mandibles are generally 
short f. 
The club of the antennz in the remaining Lucanides is composed 
of the seven last joints. 
Synpesus, Mac L.—Stvopenpron, 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 antenne are 
less geniculate f. 
The Lucanides of our second section have their antenne 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 maxillz 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 
Passauus, Fab. 
Restricted by M. Mac Leay to those species in which the club of the 
: * T unite the Ceruchus and Platycerus, Mae Leay, with Lucanus. The propor- 
tions of the mandibles, palpi, maxillary lobes, ligula and club of the antenna, do not 
furnish constant and rigorous characters. 
t The Lucanus parallelipedus of Fabricius, forming, with another species, the genus 
Dorcus of Mac Leay. I also unite to Platycerus the Nigidius, Aigus, and Figulus 
of the same learned entomologist. 
¢ Synodendron cornutum, Fab.; Donoy., Insect. of New Holl., tab. I. 4; Syn- 
desus cornutus, Mac L., Hor. Entom. I, p. 104. 
