570 
INSECTA. 
dilated into short wing-like appendages, and the hind tibiae are very compressed, and margined by a membrane. 
C. aurita, Linn., [a species not uncommon in the woods in Kent]. 
Ciccus, Latr., has the antennae terminated suddenly after the second joint in a seta composed of four distinct 
cylindric and elongated joints ; the anterior extremity of the head is generally advanced. [Exotic species.] 
Messrs. Serville and Saint Fargeau [as well as Drs. Germar and Burmeister] have established numerous additional 
genera in this group. The Eurymela fenestrata, Serv. and St. F., described by them as Brazilian, is a native of 
New South Wales, the description given of which by these authors being inexact, the insect possessing ocelli, 
although difficult to be detected. Hence this genus ought to be introduced at the genus Issus. 
Cercopis, Fab., Germ. {Aphrophora, Germ.), has the third joint of the antennae conical, and terminated by an 
articulated seta. 
[C. vulnerata, Rossi, the only British species closely allied to C. sanguinolenta, Linn., is a common 
insect, and the handsomest in the family; being black, with 
blood-red spots.] C. \_Aphroplior<i\ spumaria, Linn., is an ex- 
tremely abundant species, the larva of which is found upon 
leaves and twigs in the midst of a frothy secretion, of a white 
colour, which has been commonly called Cuckoo-spit. 
In the other Cicadarise, terminating this family, [and 
forming the tribe Cicadellines, and which in the earlier 
works of Fabricius formed his genus Cicada], the pro- 
Fig. 101. — Aphrophora spumaria ; a, imago ; b, frothy secretion ; 
c, pupa, thorax is not at all, or scarcely, prolonged posteriorly, 
and is terminated by a straight, or nearly straight, line, as long as the breadth of the body, the 
scutellum, at its base, occupying a great portion of this breadth. 
Eulopa, Fallen, has the eyes very prominent, the head but little advanced beyond the eyes, but depressed, 
and forming a kind of ridge round the face ; two ocelli placed on the posterior and superior part of the head, and 
legs destitute of spines or teeth. C. Ericce, a small species, [found on heaths]. 
Eupelix, Germar, has the head in the form of an elongated and very flat triangle, with the ocelli situated in 
front of the eyes, upon the edges of the head, which are prolonged, nearly cutting through the eyes. C. cuspidata, 
Fab. [a rare British species, found with the preceding]. 
Pentliimia, Germ., has the antenn® inserted in a large channel, reducing the space between the eyes more than 
ordinary ; the head, seen from above, appears semicircular, and gradually deflexed in front ; it is rounded, and its 
edges are extended above these channels ; the body is short. These insects have some resemblance to Cercopis, 
with which Fabricius united them. C. sanguinieollis, Fabr., [a very rare British species]. 
Gypona, Germar, appears to be closely allied to Penthimia, but I have seen no specimen of that subgenus. 
lasstis, Fabr., has the superior surface of the head comprised between the eyes, very short, transverse, and 
linear, or arched, and very little advanced even in the middle beyond the eyes. The plates at the sides of the 
clypeus are large ; the antennse terminate in a long seta ; the ocelli are situated near or below the anterior margin 
of the head. [Numerous small British species, divided by Curtis, Lewis, Burmeister, and Germar into various 
subgenera.] 
Cicadella proper, or Tcttigonia, Fabr., Oliv. ; Cicada, Linn., has the head, seen above, triangular, without being 
either very long or very flat, whereby it is distinguished from Eupelix ; the eyes also are not cut into by the sides 
of the head ; the ocelli are situated between them. These insects are, in other respects, very nearly related to 
lassus, as well as in respect to the extent of the plates at the sides of the face, and the length of the seta of the 
antennse, which appears to be articulated at its base, as in Ciccus, from which it chiefly differs in the form of the 
thorax. [This is also a very numerous group, which has been likewise much cut up by late writers.] Some of the 
species, as C. grisea, transversa, striata, Fabr., appeared to Latreille to form a distinct subgenus, from the flat- 
tened form of the head, and the ocelli inserted near its edge. 
THE SECOND FAMILY OF THE HOMOPTEROUS HEMIPTERA,— 
The Aphidii, commonly called Plant Lice, — 
Which are distinguished from the preceding by having only two joints in the tarsi, and the antennte 
filiform, or like a thread, and longer than the head, composed of from six to eleven joints. 
The winged individuals have always two wing-covers and two wings. These are very small insects, 
having the body generally soft, and the wing-covers very similar to wings, differing only in being larger 
and somewhat thicker. They multiply with exceeding rapidity. 
Some have ten or eleven joints in the antennte, the last of which is terminated by two setae. They j 
leap well, and form the genus ; 
PsYLLA, Geoff. {Chermes, Linn,). 
These Hemiptera, which are also termed by the French False Plant-lice, live upon trees and plants, , 
