1900 SUPPLEMENT—RECENT INTRODUCTIONS, &C.° 135 
Beetles—continued. 
use. Had Dyticus marginalis been selected for dissection, 
the mandibles would have been found doing their proper 
duty as jaws—a duty which may easily be inferred also 
A.—Dorsal View. 
Fic. 160. DISSECTION OF EXTERNAL SKELETON OF STAG BEETLE (Lucanus cervus), SOMEWHAT REDUCED, 
Beetles—continued. 
Of the lower surface (I. B.) of the head, a is the mentum, 
or chin, which, with the ligula and accompanying para- 
gloss and labial palpi (c), forms the labium, or lower lip. 
epur~ 
— = : 
B Bas 
> 
B.—Ventral View. 
DESCRIPTION OF PLATE. 
B. Ventral surface. 
a. Mentum. 
b. Eye. 
ae aa eae : 
ce. Ligula, with paraglosse and labial palpi. 
d, Maxille, or lower jaws. ee 
d. i, Maxillary palpi. 
e. Antenne. 
Jf. Mandibles, or upper jaws. 
Il.—Thorax.—i. Prothorax. ii. Mesothorax, iii, Metathorax. 
i. A. Pronotum. 
a. Anterior margin. 
vb. Posterior margin. 
c. Medial line. 
d, Apex. 
J. Base. 
m. Lateral margin. 
n. Anterior angles. 
o. Posterior angles. 
p. Dise. 
from an inspection of the head of the pretty Tiger Beetle 
(Cicindela campestris) or one of the Garden Beetles 
(Carabus). 
i. B. Prosternum, bearing the fore or anterior pair of 
legs, having the following divisions : : 
a. Coxa. 
b. Trochanter. 
ec, Femur. 
d. Tibia. 
e. Tarsus, with five joints, the last terminated by a pair 
of ungues, or hooks. 
ii, A. Mesonotum, bearing the two elytra, on which are: 
Apex. 
Base. 
Scutellum. 
. Lateral margin. 
Suture. 
Dise. 
PP aSSR > 
ii. B. Mesosternum, bearing the mid-pair of legs. 
iii. A. Metanotum, bearing the two wings. 
iii, B. Metasternum, bearing the two hind-legs. 
Ill.—Abdomen. 
A. Dorsal surface. 
B. Ventral surface. 
b is the eye, and d are the maxilla, or lower jaws, with 
their accompanying maxillary palpi (d 1). 
Passing now to the second division of the body—the 
