110 HEMIPTERA. 



TABLE OF GENERA. 



I. Anterior tarsi inserted at the extremity 

 of the tibiae. 



A. Anterior tibiae fossorial, dilated, flat, 

 serrated or toothed externally. 



a. Ocelli present. 



1. Second joint of the rostrum di- 

 lated beneath into a membranous 



lobe 1. LOBOSTOMA. 



2. Second joint of the rostrum sim- 

 ple. 



a. Antennae of five joints. 



* Secohd joint of the antennae as 

 long or longer than the third. 

 a. Eyes not enclosed within 

 the margins of the head. 

 ** Body convex ; posterior 

 tibiae stout, thickly co- 

 vered with strong spines 2. CYRTOMENUS. 

 *tt Body more or less de- 

 pressed ; posterior tibiae 

 slender, with the spines 

 weaker than in the pre- 

 ceding. 



aa. Apical margin of the 

 corium strongly sinu- 



ated 4. CYDNUS. 



ftft. Apical margin of the 

 corium not sinuated. 

 aa. Posterior tibiae 

 very long, half the 

 length of the body 5. ECTINOPUS, 

 bb. Posterior tibiae 

 less than half the 

 length of the body 3. ^ETHUS. 

 ft. Eyes enclosed within the 



lateral margins of the head 7. HIVERUS. 

 f Second joint of the antennae 



very small . .*. 11. AMNESTUS. 



b. Antennae of four joints 6. ACATALECTUS. 



b. Ocelli wanting 8. CHCEROCYDNUS, 



B. Anterior tibiae not fossorial, spinous. 



a. Second joint of the antennae not 



longer than the third 12. SEHIRUS. 



b. Second joint of the antennae much 



longer than the third 13. DISMEGISTUS. 





