ClCADIDiE. 
277 
latter broad and transverse, never produced in front, 
with three ocelli on the crown* (PI. XVIII. fig. 2, b,) 
the hind legs are thickened and adapted for leaping, 
and all the tarsi are three-jointed ; females with an 
ovipositor ; males musical. 
The first example of this fine genus, figured for 
the first time, is named 
CICADA ( POLYNEURA ) DUCALIS. 
Plate XVIII. Fig. 1. 
The head is black, with two minute buff-coloured 
spots over the insertion of the antennse. The thorax 
is considerably broader than the head, and angulated 
on each side, near the middle, the colour black, with 
a narrow anterior and broad posterior margin of yel- 
low. The remainder of the body is black, except 
the posterior margin of the basal segments of the 
abdomen, which are chestnut in the centre. The legs 
are black, with the thighs, except at the tip, scar- 
let. The general colour of the anterior wings is 
chocolate brown, darkest at the base, the anterior 
costa at the base, and the veins, of a rich golden 
yellow ; the latter are divided, rather before the centre 
of the wing, by a curved transverse vein, thicker than 
the rest ; from the base of the ■wing to this vein, the 
longitudinal veins are furcate, beyond it they are 
numerous, and form a great number of irregular shaped 
cells, (differing on the opposite wing,) and terminat- 
ing in about twenty longitudinal veins, received by 
another vein which runs parallel with the exterior 
margin of the wing. The hinder wings are of a dull 
buff-ochre colour, paler next the body. 
