402 INSECTA. 



in which she deposits her eggs. As the number of the latter is considerable, 

 she makes several holes, indicated externally by as many elevations. The 

 young larva; however leave their asylum to penetrate into the earth, where 

 they grow and experience their metamorphosis. Their anterior legs are 

 short, have very stout thighs armed with teeth, and are adapted for digging. 

 The Greeks ate the pupa, which they called Tettigometra, and even the 

 perfect insect. 



The C. orni, by wounding the tree from which its specific name is derived, 

 produces that peculiar honey-like and purgative juice called manna. This 

 species is about an inch long ; yellowish ; pale beneath, the same colour 

 mixed with black above ; margin of the abdominal segments, russet ; two 

 rows of blackish points on the elytra, those nearest their inner margin the 

 smallest. South of France, Italy, &c. 



The other Cicadariae Mutes have but three distinct joints in the antenna*, 

 and two small ocelli. Their legs are usually adapted for leaping. Neither of 

 the sexes is provided with organs of sound. 



The elytra are frequently coriaceous and opaque. Several females envelope 

 their eggs with a white substance resembling cotton. 



Some of them FulgorellcE have the antenna; inserted immediately under 

 their eyes, and the front frequently prolonged in the form of a snout, the 

 figure of which varies according to the species. By tliis we distinguish the 

 genus 



FULGORA, Linnaus, Olivier, 



Now variously subdivided. 



In the last of the Cicadariae, the antenna; are inserted between the eyes ; 

 they compose the genus 



ClCADELLA, 

 Which is divided into Membracis, Tragopa, D<trni.t, &c. &c. 



FAMILY II. 



APHIDII. 



THE second family of the homopterous Hemiptera, or the fourth of the 

 order, is distinguished from the preceding one by the tarsi, which are composed 

 of but two joints, and by the filiform or setaceous antennae, which are longer 

 than the head, and have from six to eleven joints. 



Those individuals which are winged always have two elytra and two 

 wings. 



These insects are very small ; their body is usually soft, and their elytra 

 are nearly similar to the wings, or only differ from them in being larger and 

 somewhat thicker. They are astonishingly prolific. 



