HEMIPTERA HETEROPTERA. a 
Fam. 2. ARADIDZ. 
Aradide, Serv. Hist. Hem. 307. 
A. Second joint of the antenne longer than all the 
others together. - - - = 1. ARADUS. 
B. Second joint of the antenne not longer than the 
third. 
a. Scutellum not very large. 
* Body not linear. - - - - - 2. PresTosoma, 
** Body linear. = = - - 3. MELANOSTESPHUS. 
b. Scutellum very large. - - - - 4. ARADACANTHIA. 
The Brachyrhynchide and Aradide are united in one family, and are 
thus distributed in genera by Prof. Stal :— 
A. Rostrum extending beyond the base of the head. 1. ARADUS. 
B. Rostrum not extending beyond the base of the 
head. 
a. Scutellum large, extending far beyond. the 
middle of the abdomen. - - - 2. Caxisius. 
b. Scutellum of moderate size. 
* Membrane veined. 
+ First joint of the antenne longer than the 
second. 
{ First joint of the antenne very long, with long 
and thick-set bristles. - - - 3. ALYATTES. 
tf First joint of the antenne 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. - ale 5. Dysonius. 
oo Segments of the abdomen not lobate. 
— First joint of the antenne shorter than the head. 
Scutellum not tuberculate. 
++ Sides of the prothorax bent, lobate in front of 
the band. 
« Head with a tooth behind the eye. Hind border 
of the prothorax bent. - 6, Cixypuus. 
woro Head with no tooth behind the eye. Hind 
border of the prothorax straight. - . 7, ARTABANUS. 
++++ Sides of the prothorax slightly bent, not lobate 
in front of the bend. - - 8. Hesus. 
++ First joint of the antenne as long as the head. 
Scutellum with a tubercle. - - 9. CRIMIA. 
