CURCULIONITES. INSECTS. 301 



A. With wings. 



a. Antennae short, the first joint scarcely surpassing the eyes. 



Gen. CURCULIO, (Entimus, Germ.); RHIGUS, CYPRUS, CENCHROMA, 

 CHLORIMA, CLOROPHANUS, TANYMECHUS, SITONE, HYPSONOTUS, 

 EUSTALIS, GASTRODORUS, (Rembus, Germar ;) POLYDRUSUS, METAL. 

 LITUS. 



b. Antennae long ; the first joint prolonged beyond the eyes. 



Gen. PHYLLOBIA, POLYDIA, LEPTOCERUS. 

 B. No wings. 



a. Cushion distinct. 



Gen. LIOPHLEA, HERPISTICUS. 



b. Cushion none, or little apparent. 



* Antennae sensibly longer than the thorax. 



Gen. HYPHANTUS, BRACHYRINUS, (Otiorhyncus ;) PERITELES, EUSOMA, 

 SYZYGOBS, (Cyclopus, Dej.) 



This last genus is formed for an insect from the Isle of France, remarkable for 

 having the eyes united on the summit of the head. 

 * Antennae shorter than the thorax, or scarcely its length. 



Gen. OMIAS, BARYNOTUS, THYLACITA, TRACHYPHL^EA, TRACHODES, PA- 

 CHYRHYNCUS, (SpJierogaster, Dej.) PSALLIDIUM. 



2. Antennas almost straight, with nine apparent joints, of which the last forms the 

 club ; joints of the tarsi entire. 

 Gen. BRACHYCERUS. 



II. Antennae inserted at a marked distance from the end of the rostrum, generally 

 towards the middle, and sometimes between the eyes ; rostrum for the most part 

 long ; mandibles often dentated ; posterior feet in many formed for leaping, on. 

 account of the thickness of the thighs. 

 This division is composed of some of the genus Curculio of Fabricius, and of his 



genera Lixus and Rhynchcrnus. 



1. No hook on the legs ; antennae of ten or eleven distinct joints, of which the last 

 three at least compose the club. 



A. No leaping feet. 



a. Club of the antennae commencing at the eighth or ninth joint. 

 * Rostrum free, or not received into a furrow or hollow of the pre- sternum. 

 | No wings nor cushion. 



- Club of the antennae composed of three joints. 

 Gen. BRONCHUS, PLINTHUS, (Meleus, Dej.) 



Club of the antennae of four joints. 



Gen. LIPARUS, (reduced to the apterous species,) ORTHOCH^ETES. 

 || With wings. 



Club of four joints, commencing with the eighth. 



Gen. Lixus, LEPIRUS, HYLOBIA, (Liparus, Germar;) CHRYSOLOPUS. 

 SIEINIA, BRADYBATES, TANYSPHYRUM. 



Club of the antennae of three joints, or commencing with the ninth. 

 Rostrum of both sexes shorter than the body. 



|| Anterior feet little longer than the others, or of the same length. 



Gen. HEILIPUS, PISSODES, BAGOUS, HYPERUS, (the winged species of Ger. 

 mar,) TYCHTA, MAGDALIS, NOTARIS, APSIS, BARIS. 



HI) Anterior feet perceptibly larger than the others. 



Gen. DIONYCHUS, AMERIS, CHOLUS, PCECILME, (the species of Germar with 

 the rostrum disengaged or free ;) ANTHONOMUS, DOEYTOMUS. 



