178 INSECTA. 



minates by a truncation, so as to serve as a point d'appui to the base 

 of the scutellum, and even frequently receiving it, this truncated part 

 being concave or^emarginated. 



jEtalion, Lat.-^^TAUA, Germ. 



The Insects of this subgenus are distinguished from those of other 

 subgenera of the same division by several characters. The head, 

 viewed from above, merely presents a transversal edge ; the front is 

 abruptly inclined, and the ocelli are situated there between the ordi- 

 nary eyes, and consequent!)'- inferiorly. The antennae, very small 

 and distant from the latter organs, are inserted beneath an ideal 

 line drawn from one to the other. The space immediately under 

 the front is flattened and smooth. The tibiae are neither ciliated nor 

 dentated * 



In the three succeeding subgenera, the vertex is triangular and 

 bears the ocelli. The antennae are inserted in an ideal line drawn 

 from one ordinary eye to .the other or above it. 



Ledra, Fah. 

 Where the head is much flattened before the eyes, in the form of a 

 transversal clypeus, arcuated, and terminated in the middle of the an- 

 terior margin by an obtuse angle. All the under part of the head is 

 plane or on a level. The sides of the prothorax project in the man- 

 ner of horns rounded at the extremity, or of pinions. The posterior 

 tibiae are strongly compressed and as if bordered externally by a den- 

 tated membrane. The 



L. aurita^,^ Cicada aurila,h; Cigale Grand-Dlable, GeoS., 

 belongs to this subgenus f . 



'^ CiccuR, Lat. 

 Where the antennae terminate directly after the second joint in a 

 seta composed of five distinct, cylindrical, and elongated joints. The 

 anterior extremity of the head usually projects J. 



* Lat., consid., sur I'Ord. des Crust, des Aiach. et des Insect, and the Zool., 

 and Anat. of MM. Humboldt and Bonpland. See Germar, Magas. der Entom., IV, 

 p. 94. 



t Pee Fab., Syst. Ryng-ot., and Lat., Gener. Orust. et Insect., lU, p. 1.57. See 

 also Encyc. Method., insect., X, 600. article Teftigone, and also n^e/iigonides, lb., 

 where the editors, Messrs. Lepeletier and Serville, offer some netv considerations 

 and establish new genera, but with which I was unacquainted until I had terminated 

 my work on this family, and consequeutly had no time to verify, on the Insects 

 themselves, the characters which they assijrn to those sections. I will restrict my- 

 self to the following remark. The description of tbe~TSifrijmele fenestree exactly 

 agrees with a species figured by Donovan, in his splendid work on the Insects of 

 New Holland, and consequently the editors of the article in question must have been 

 deceived as to the habitat of this Insect, which they say is from Brazil. In case 

 this synonyme be correct, the distinctive character of this new genus, the absence of 

 simple eyes, would be false, for they exist on the superior part of the front, although, 

 at &'st, they are not easily perceived. This species would then re-eutcr the subge- 

 nus vossits. ^ 



X The'^Cicada adspersa and marmoratn, Fab, ; his Fiilgora adsrendens, ^c, I pre- 

 sume that several other species of the gem\s\'icada of this author, and of ihe^ttti- 

 gonia of M. Germar, should also be referred to it; my collection of them, however, 

 not being sufficiently numerous, I content myself with these indicia. 



