HEMIPTERA HETEROPTERA. 



Fam. 2. ARADIDiE. 



Aradidae, Serv. Hist. Hem. 307. 



A. Second joint of the antennas longer than all the 



others together. - - - - 



B. Second joint of the antennae not longer than the 



third. 



a. Scutellum not very large. 

 * Body not linear. - 



** Body linear. 3. 



b. Scutellum very large. - - - - 



1. Aradus. 



2. PlESTOSOMA. 



Melanostesphus. 

 4. Aradacanthia. 



The Bracbyrhynchidae and Aradidae are united in one family, and are 

 thus distributed in genera by Prof. Slal : — 



A. Rostrum extending beyond the base of the head. i. Aradus. 



B. Rostrum not extending beyond the base of the 



head. 



a. Scutellum large, extending far beyond the 



middle of the abdomen. - 2. Calisius. 



b. Scutellum of moderate size. 

 * Membrane veined. 



f First joint of the antennae longer than the 



second. 

 I First joint of the antennae very long, with long 



and thick-set bristles. 3. Alyattes. 



\X First joint of the antennae without long or thick- 

 set hairs. 

 § Head with a spine on each side extending 



beyond the eyes. - 4. Arictus. 



§§ Head with no spine extending beyond the 



eyes. 

 X Head extending much in front of the antenni- 



ferous tubercles, 

 o Segments of the abdomen lobate. - - 5. Dysooius. 



oo Segments of the abdomen not lobate. 

 -+• First joint of the antennae shorter than the head. 



Scutellum not tuberculate. 

 ++ Sides of the prolhorax bent, lobate in front of 



the band. 

 <&> Head with a tooth behind the eye. Hind border 



of the prolhorax bent. ... 6. Cinyphus. 



«5i<^» Head with no tooth behind the eye. Hind 



border of the prothorax straight. - - 7. Aktabanus. 



++++ Sides of the prolhorax slightly bent, not lobate 



in front of the bend. - 8. Hesds. 



h — ¥ First joint of the antenna; as long as the head. 



Scutellum with a tubercle. - - 9. Crimia. 



