HEMIPTERA. 151 



. Second joint of the antennae much 

 longer than the third. 



* Body broad, flat above; mem- 

 brane generally rudimentary . . 1. PLATYCORIS. 



"t Body ovate, more or less convex ; 

 membrane fully developed. 



a. Basal joint of the antennae 



longer than the head 19. AGENOR. 



b. Basal joint of the antennae 

 shorter than the head. 



** Lateral lobes of the head 

 meeting beyond the central 



lobe 11. DINIDOR. 



~tf Lateral lobes not meeting. . 20. PCECILOTOMA. 

 /3. Second joint of the antennae shorter 

 than the third. 



* Antennae slender; membrane with 



longitudinal nervures 12. CHLOROCORIS. 



t" Antennae stout; membrane with 



reticulated nervures 13. ALC.EUS. 



b. Central lobe of the head as long or 

 longer than the lateral lobes. 

 <z. Antenniferous tubercles prominent, 



siibspinous , 2. NOTIUS. 



$. Antenniferous tubercles unarmed. 



* Membrane with three nervures. . 15. BATHRUS, 

 f Membrane with more than three 



nervures. 



a. Antennae very long, four- 

 jointed, with the second joint 

 longer than the third; legs 



very long 17- EUMECOPUS. 



b. Antennae moderate, of four or 

 five joints. 



** Antennae very slender 18. ECTENUS. 



ft Antennae stout. 



aa. Margins of the abdomen 



spinous 14. SPUDJSUS. 



j8/3. Margins of the abdomen 



unarmed 16*. PCECILOMETIS. 



II. Basal joint of the antennae not reaching 



the anterior margin of the head. 

 A. Lateral margins of the head with a di- 

 stinct spine in front of the eyes, 

 a. Body convex ; scutellum not reach- 

 ing the apex of the body 5. SYMPIEZORHINCUS. 



