HEMIPTERA. 377 



TABLE OF GENERA. 



I. Head with an emargination between the 

 antenniferous tubercles*. 



A. Antenniferous tubercles not spinous 

 externally. 



a. Last joint of the antennae shorter 

 than the preceding. 



1 . Third joint of the antennas more 

 or less compressed. 



a. Thorax unarmed 1. BRACK YTES. 



/3. Thorax with the lateral angles 



produced into flat lobes .... 3. DALADER. 



2. Third joint of the antenna? cy- 

 lindrical 14. AMORBUS. 



b. Last joint of the antennae as long 

 as, or longer than the preceding. 



1. Third joint of the antennae di- 

 lated into a broad spatuliform 



plate 6. MOLCHINA. 



2. Third joint of the antennae cy- 

 lindrical, or compressed and 

 slightly dilated. 



a. Abdomen ovate ; its margins 



projecting considerably beyond 



the elytra on each side. 



* Lateral angles of the thorax 

 dilated into broad, flat, wing- 

 like processes, which are di- 

 rected forwards, acute at the 

 apex and toothed inside . . 4. DEREPTERYX. 



f Thorax unarmed. 



a. Tibiae simple ; third joint 



of the antennae cylindrical. 2. BARDISTUS. 



b. Tibiae dilated; third joint 

 of the antenna? com- 

 pressed 5. PETASCELIS. 



/3. Abdomen elongate, narrow, 

 scarcely projecting beyond the 

 elytra 10. MICTIS. 



B. Antenniferous tubercles spinous ex- 

 ternally. (PL XII. fig. 2.) 



a. Last joint of the antennae as long 

 as, or longer than the third. 



* Except in the genus Bardistus, in which the space between the 

 antenniferous tubercles is more or less filled up. 



s5 



