194 



HEMIPTERA. 



* Central lobe reaching the 

 apex of the head. 



a. Scutellum very long, 

 reaching the apex of 

 the abdomen, with its 

 sides nearly parallel ; 

 thoracic processes chan- 

 nelled ............... 10. ALCIMUS. 



/3. Scutellum not reach- 

 ing the apex of the 

 abdomen, narrowed to- 

 wards the middle ; tho- 

 racic processes not chan- 

 nelled. 



** Antenniferous tuber- 

 cles not prominent; 

 thoracic processes ta- 

 pering, with their 

 apices acute ........ 9. HOPLJSTODERA. 



tt Antenniferous tuber- 

 cles very prominent, 

 slightly spinous ; tho- 

 racic processes nearly 

 linear, with their apices 

 emarginate ........ 11. TAURODES. 



f Lateral lobes of the head 

 meeting beyond the cen- 

 tral lobe .............. 12. ^ESCHRUS. 



b. Lateral angles of the thorax 

 unarmed or simply promi- 

 nent. 



* Anterior angles of the ros- 

 tral canal produced down- 

 wards into long tusklike 



spines ................ 13. AXIAGASTUS. 



t Anterior angles of the ros- 

 tral canal unarmed. 

 a. Lateral lobes of the head 

 meeting beyond the cen- 

 tral lobe ............ 14. 



j3. Central lobe reaching 

 the apex of the head. 

 ** Membrane with lon- 



gitudinal nervures . . 15. 

 ft Membrane with reti- 

 culated nervures. ... 16. 



EYSARCORIS. 

 CCENUS. 



