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ENTOMOLOGY. 



Fulgora. Latr. Olivier. 



Cicada. Villers, 



Front as if truncated, not rostrated, vertical. Elytra 

 at their external base very much dilated, with the apex 

 narrower. Body short, deltoid. Eyes globular. 



Sfi. I. Colco/itra/us. Elytra greyish, oTten banded or 

 variegated with black. 



Genus CCCXCVIII. Cixius. Leaeh. 



Fulgora. Latreille. 



Flata. Fabricius. 



Front as if truncated, not rostrated, vertical. Elytra 

 with the external margin nearly straight, or scarcely 

 arcuate. Body elongate, quadrate. Eyes globular. 



Sfi 1. JVcrvosus. 



Flata nervosa. Fabricius. 



Genus CCCXCIX. Tetigometra. Latr. 



Fulgora. Panzer. 



Antennae cylindric ; second joint somewhat ovate- 

 rounded, twice as long as the first; the apex excavated 

 for the insertion of the third or last joint. Body ovate 

 and depressed. Eyes triangulate. 



Sfi. 1. Virescens. Yellow-green eyes; and mouth 

 black. Feet red. 



Fulgora virescens. Panzer. 



Tetigometra virescens. Latr. 



Inhabits France and Germany. 



Family II. Delfihacida. 



Antennae inserted in the internal sinus of the eyes, the 

 two first joints as long, or longer than the head. 



Genus CCCC. Asikaca. Latr. 



Deli'hax. Fabricius. 



Antennae as long or longer than the thorax, the first 

 joint very long, compressed, angulate. 



Sfi. 1. Clavicornis. Body brown, or obscure brown 

 variegated ; apex of the four anterior tibiae white ; elytra 

 semihyaline ; apex with a fuscous band ; nerves spotted 

 with fuscous. 



Delfihax clavicornis. Fabr. 



Asiraca clavicornis. Latr. 



Inhabits France and England in grassy places. 



Genus CCCCI. Delfhax. Fabr. Latr. 



Antennae not, or scarcely, longer than the head ; the 

 first joint much shorter than the second. 



Sfi. 1 . Pellucida. Body pellucid. 



Delfihax fiel/ucida. Fabr. 



Inhabits Europe amongst grass. 



Family III. Ccrcofiida. 



Antennae inserted between the eyes. Thorax not 

 transverse, hinder margin more or less prominent. 



Genus CCCCI I. Cetalion. Lair. 



Lystha. Fabricius. 

 . Antennae inserted behind the frontlet. 



Sfi. 1. Reliculatum. 



Lestra reticulata. Fabricius. 



Genus CCCC1II. Cercofis. Fabr. Schrank, Latr. 



Cicada. Linn. 



Tettigonia. Olivier. 



Antennae inserted on the frontlet, the second longer 

 than the first joint, the third joint short conic. Thorax 

 not dilated. 



,Sfi. I Sanguinolenta. Black, shining ; each wing-case 

 with a spot at the base, one in the middle, and a flexu- 

 ous band at the apex blood-red. 



Cicada sanguinolenta. Linn. 



Cercofiis sanguinolenta. Fabr. 



Inhabits France, Germany, and England. 



• Genus CCCCIV. Lebra. Fabr. Latr. 



Cicada. Linn. Geoffroy. 



Membracis. Olivier, Lamarck, Schrank. 



Antennae inserted on the frontlet, the two first joints 

 equal in length, the first rather thickest, the third ending 

 in a long seta. Thorax on each side dilated into an auricle. 



Gents CCCCV. Membracis. Latr. 



Centrotus. Fabr. 



Membracis. Fabr. 



Cicada. Linri. 



Antennae inserted in the frontlet ; the two first joints 

 nearly equally long ; the third elongate-couic. Thorax 

 dilated behind. 



Sfi. 1. Cornulus. Brownish. 



Cicada cornuta. Linn. 



Centrotus cornulus. Fabr. 



Membracis cornuta. Latr. 



Family IV. Cicadida. 



Antennae inserted between the eyes. Thorax trans- 

 verse, hinder margin straight. 



Genus CCCCVI. Iassus. Fabr. 



Tettigonia. Latr. Olivier, Lamarck. 



Front broad, not longer than broad, on each side above 

 the insertion of the antennae produced into an angle. 



Sfi. 1. Lanio. 



Cicada lanio. Panzer. 



Iassus lanio. Fabr. 



Tettigonia lanio. Oliv. Lamarck. 



Inhabits Europe. 



Genus CCCCVII. Cicada. Linn. Fabr. Latr. 



Tettigonia. Olivier, Lamarck. 



Front elongate-quadrate, the apex truncate, convex, 

 thickened. 



Sfi. 1. Viridis. 



Cicada viridis. Fabricius, Panzer. 



Tettigonia viridis. Latreille. 



Inhabits Europe. 



Tribe III. Psyllides. 



Tarsi with two joints distinct. Antennae with ten or 

 eleven joints, the last with two setae. Legs formed for 

 leaping. Both sexes with wings. 



Genus CCCCVIII. Psylla. Geoffroy, Olivier, La- 

 marck, Latreille. 



Chermes. Linn. De Geer, Fabricius. 



Antennae filiform or slightly setaceous, as long as the 

 body. Thorax with the anterior margin arcuate. 



Sfi. 1. Alni. Green-yellowish; anterior segment of the w 

 thorax, scutellum, squamula of the elytra and nerveurs 

 green. 



Chermes bctulx aim. Linn. 



Chermes alni. Fabricius. 



Psylla alni. Latreille. 



Inhabits the alder. 



Genus CCCCIX. Livia. Latreille. 



Dikafiiia. Illiger. 



Antennae shorter than the thorax, the base much thick- 

 ened even to the middle. Thorax with the anterior seg- 

 ment transverse, straight. 



Sfi. 1. Juncorum. 



Livia juncorum. Latreille. 



Inhabits Junci. 



Tribe V. Aphides. 

 Tarsi two-jointed ; the first joint very short. Rostrum 

 in both sexes. Antennae with six or seven or eight joints. 

 Females generally apterous. 



