152 HEMIPTERA. 



b. Body depressed, somewhat foliace- 

 ous; scutellum reaching the apex of 

 the body, narrowest in the middle, as 

 wide at the apex as at the base .... 6. CORIPLATUS. 

 B. Lateral margins of the head unarmed. 



a. Antennae four-jointed, with the se- 

 cond joint compressed 21. ATELOCERA. 



b. Antennae five-jointed, cylindrical. 



a. Lateral margins of the thorax re- 

 flexed, trenchant 28. AG^EUS. 



)3. Lateral margins of the thorax not 

 reflexed. 



* Thorax with the lateral margins 

 smooth. 



a. Lateral angles of the thorax 

 unarmed. 



** Head rather short and 

 broad, 

 aa. Rostrum reaching the 



apex of the abdomen . . 9. MECISTORHINI 

 $3. Rostrum shorter than 

 the abdomen 

 aa. Membrane very short, 



sometimes rudimentary 8. MAZIUM. 

 bb. Membrane of mode- 

 rate size. 



aa. Second joint of the 

 antennae shorter than 



the third 10. ANTITEUCHUS 



bb. Second joint of the 

 antennae longer than 



the third 30. TRACHYOPS. 



ft Head elongated, tapering, 

 aa. Tibiae furrowed longitu- 

 dinally on the outside . .23. MECOCEPHALA 

 /3/3. Tibiae cylindrical .... 22. AGONOSCELIS. 

 b. Lateral angles of the thorax 



spinous 24. GYNENICA. 



t Thorax with the lateral margins 

 more or less denticulated. 



a. Scutellum reaching the apex 

 of the body, quadridentate at 



the apex 25. PELTASTICUS, 



b. Scutellum more or less tri- 

 angular, with the apex en- 

 tire. 



