j26 
INSECTS. 
as far as the eyes ; terminal and exterior lobe of the jaws wid¬ 
ened towards its extremity. 
Genus MEGALOPUS.— Fabricius. 
Generic Character. —Antennae short, somewhat serrated ; 
mandibles strong, acute, and entire, crossed at their point; 
palpi equal, filiform; body flattened ; thorax short, subquadrate ; 
feet strong; tarsi short. 
Megalopus nigricornis. — The Black-Horned Megalopus. 
Plate XCVIII. fig. 13. 
Body fawn-coloured yellow; antennae, legs, and feet, black; 
a black spot on the thorax; elytra greenish drab-colour, and 
downy, with distant dots ; the external margin and suture black. 
Inhabits South America. 
TRIBE VI.-CYCLICA. 
The labium thick, and nearly square or oval, entire, or a little 
notched ; exterior and terminal division of the jaws cylindrical, 
of a black and brown colour ; body either oval or ovoid, globu¬ 
lar, or somewhat square; with filiform or setaceous antennae, 
sometimes thickened into an elongated club, but never an oval or 
rounded one; the three first tarsal joints spongy, or provided 
with brushes below. 
Genus CASSIDA.— Latreille. 
Generic Character. —Antennae filiform, inserted on the upper 
part of the head, with their base approximate ; head concealed 
under the thorax, or received into a fissure, at its anterior extre¬ 
mity ; body nearly circular or square, and generally margined by 
the elytra. 
Cassida viridis. — The Green Cassida. 
Plate XCVIII. fig. 9. 
Rich green above, and black below; elytra with some faint 
dotted striae; feet red, and the lower half of the thigh black. 
Infests the artichokes and thistles of Britain. 
TRIBE VII.-CLAV1FALPI. 
First joints of the tarsi provided with brushes, and the last 
