570 



INSECTA. 



by 



dilated into sliort winii--Iike nppC'n(l.n2:es, and the liind tiliire are very compressed, and margined by a membrane. 

 C. auritii, Ijiiiii., [a sjiecies not uiicoinriioii in tlie \vouds in Keiit], 



Ciccus, Latr., has the antenna.- terminated suddenly after the second joint in a seta composed of four distinct 

 cylindric and eIong:ated joints; the anterior extremity of tlie head is generally arlvanced. [Exotic species.] 

 Messrs. ServiUe and Saint Fartreau [as well as Drs. Germar and Burmeister] have established numerous additional 

 penera in this proup. The Eurymelafenesirata, Serv. and St. F., described by them as Brazilian, is a native of 

 New South Wales, the description f^iven of which by these authors being inexact, the insect possessing ocelli, 

 althoLig-b dirticult to be detected. Hence this genus ou;?ht to be introduced at the genus Jssus. 



Cercopis, Fab., Genu. {Aphrophora, Genu.), has the third joint of the antenna conical, and terminated 

 articulated seta. 



[C. vulnerata, Rossi, the oidy British species closely allied to C. sanguinolenia, Linn., is a common 



insect, and the handsomest in the family; being black, with 

 blood-red spots.] C. [Aphrophora] spumaria, Linn., is an ex- 

 tremely abundant species, the larva of which is found upon 

 leaves and twi;^s in the midst of a frothy secretion, of a white 

 colour, which has been commonly called Cuckon-spit. 



Ill tlie other Cicadarire, termiiKiting tins family, [and 

 forming the tribe C/carfeUi/ies, and ^vbich in the earlier 

 \vnrks of Fabricius formed his genus Cicada], the pro- 

 tliorax is not at all, or scarcely, prolonged posterinrly, 

 and is terminated by a straight, or nearly straight, line, as long as the brcadtli of the body, tlie 

 scutellum, at its base, occupying a great portion of this breadth. 



Eiilopa, Fallen, has the eyes very prominent, the head but little advanced beyond the eyes, but depressed, 

 and formin;,'- a kind of ridK:e round the face ; two ocelli placed on the posterior and superior part of the head, and 

 legs destitute of spines or teeth. C. Erirce, a. small species, [found on heaths]. 



EiipelLr, Gerniar, has the head in the form of an elongated and vei7 flat triangle, with the ucdli situated in 

 front of the eyes, upon the edges of the head, which are prolonged, nearly cutting through the eyes. C. citsjudatay 

 Fab. [a rare British species, fouml with the preceding]. 



Pe/ii/iimia, Germ., has the antenna inserted in a large channel, reducing the space between the eyes more than 

 onlinary ; the head, seen from above, appears semicircular, and gradually deflexed in front ; it is rounded, and its 

 edges are extended abo\'e these channels ; the body is short. These insects have some resemblance to Cercopis, 

 with which Fabriciiis united them. C. sanguhiicolUs, Fabr., [a very rare British species]. 



G>/poii'i, Germar, appears to be closely allied to Penthimia, but I have seen no specimen of that subgenus, 



lassus, 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 antenna; tei'minate in a long seta ; the ocelli are situated near or below the anterior margin 

 of the head. [Numenjus small British species, divided byCui'tis, Lewis, lUirmeister, and Gerniai' into various 

 sidigeiiera.] 



Cicadi'Ua 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 

 lassas, 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 

 antenna, 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. grlsea, iravuversa, striata, Fabr., appeared to Lutreille to form a distinct subgenus, from the flat- 

 tened form of the bead, and the ocelli inserted near its edge. 



tup: SliCOND FAMILY OF THE IIOMOPTEROUS IIEMIPTERA,— 

 TnR Aphidii, commonly called Plant Lice, — 



Mniicli are distinguished from the preceding by having only two joints in the tarsi, and the antennas 

 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 ibickor. Tlicv multiply with exceeding rapidity. 



SoniC have ten or eleven joints in tlie antenna::, the last of wliieh is terminated by two setx. They 

 leap well, and form the genus 



PsYLLA, Geoff. {Chermes, Linn.). 



These Ilenilptera, which are also termed by the French False Plant-lice, live upon trees and plants, 



