137 



FF. — Eyes divided; thorax with blunt tubercle 

 on each side and marked with four black 

 spots — Tetraopes. 

 BB. — Front tib ae not grooved; last joint of palpi not pointed at 

 tip. 

 C. — Base of antennae partly enveloped by the eyes; front 

 coxae not conical ; eyes finely granulated ; scutellum rounded 

 behind; tibial spurs large. 



D. — Head small; process between hind coxae rounded. 

 E. — Thorax transversely excavated at sides and with 



three yellow cross bands — Cyllene. 

 EE. — Thorax not excavated at sides and without 

 yellow cross bands — Plagionotus. 

 DD. — Head large; process between hind coxae acute — 

 Clytus. 

 CC. — Base of antennae not enveloped by the eyes; front coxae 

 conical. — Desmocerus. 



CURCULIONIDAE.—(\\eevi\s.) 



Common Economic Genera. 



A — Claws simple, pygidium not exposed. 



B. — Antennae straight, club annulated, claws toothed, gular peduncle 



broad — Ithycerus. 

 BB. — Antennae elbowed, rostrum with distinct scrobes, gular pe- 

 duncle long; front coxae contiguous. 

 C. — Mandibles usually emarginate, 2-toothed at tip — Phyto- 



nomiis. 

 CC. — Mandibles bi-emarginate. 3-toothed at tip. 



D. — Lateral angles of first ventral segment uncovered — 



Lixus. 

 DD. — Lateral angles of first ventral segment not visible. 

 — Pissodes. 

 AA. — Claws appendiculate, toothed or cleft (except in Tyloderma). 



B. — Ventral sutures straight, hind angles of prothorax rectangular 

 or rounded, prosternum short, broadly emarginate, eyes rounded 

 distant — -Anthonomus. 

 BB. — Ventral sutures more or less curved. 



C. — Beak received in or upon the breast in a pectoral groove 

 confined to prosternum; beak long; tarsi dilated; front 

 coxae contiguous — Conotracheliis. 



