HEMIPTERA. 153 



** Anterior and posterior tibiae 



dilated 26. ERTHESINA. 



ft Posterior tibiae simple ; the 

 anterior sometimes dilated, 

 aa. Lateral lobes of the head 

 longer than the central 

 lobe. 



. aa. Margins of the abdo- 

 men pectinated 34. MUST HA. 



bb. Margins of the abdo- 

 men not pectinated, 

 aa. Scutellum large, 

 broad, and rounded 



at the apex 32. EURUS. 



bb. Scutellum triangu- 

 lar. 



)). Lateral margins 

 of the thorax 

 strongly emargi- 

 nate in the middle, 

 with the anterior 

 portion strongly 



toothed " 31. BROCHYMENA. 



((. Lateral margins 

 of the thorax near- 

 ly straight, finely 

 denticulated .... 33. APODIPHUS. 

 8)3. Central lobe of the head 

 as long as, or longer than, 

 the lateral lobes. 

 aa. Head elongated, ta- 

 pering, pointed in front 29. HALYS. 

 bb. Head rounded or trun- 

 cated at the apex, with 

 the sides more or less 

 parallel. 



aa. Lateral margins of 

 the head toothed near 



the apex 27- DALPADA. 



bb. Lateral margins of 



the head unarmed . . 35. CCENOMORPHA. 



H5 



