HEMIPTERA HETEROPTERA. 
29 
Rostrum extending to the tip of the abdomen. - 
vcnuTi Rostrum not extending beyond the rnetapectus. 
-j- Eyes semicircular. . 
— \- Eyes elongated. - 
-+-J- Sides of the prothorax with distinct keels. 
++ Prothorax excavated in front. 
<&> Head triangular. .... 
Head pentagonal. - 
Prothorax straight in front, 
u* Prothorax elongated or almost rectangular. 
-f- Rostrum extending to the middle of the meta- 
pectus. - 
-] — f- Rostrum extending to the hind border of the 
mesopectus. 
= Fore femora unarmed, rarely with some bristles 
on the under edge. 
© Secoud joint of the rostrum longer than the first. 
OO Second joint of the rostrum shorter than the first. 
= = Fore femora with one or more spines beneath. 
O Fore femora with a stout spine near the tip. 
© © Fore femora with two minute spines in the 
middle. - 
Prothorax trapeziform, varying in length. 
+ Head longer than the breadth of the neck. 
= Body and limbs roughly hairy. - 
= = Body and limbs bare, or at most finely hairy. 
© Fore femora not very thick. - 
0© Fore femora very thick. - 
-j — (- Head shorter than the breadth of the neck. 
= Sides of the prothorax straight. 
© Body bare, smooth, shining. - 
©© Body wholly pubescent. ... 
= = Sides of the prothorax excavated. 
© Prothorax with a conspicuous rim on the fore 
border. - 
© © Prothorax with no rim on the fore border. 
V Fore femora unarmed. - 
VV Fore femora with bristles on both edges beneath, 
oo Sides of the prothorax foliaceous. 
— Sides of the prothorax foliaceous only on the 
hinder half. - 
-t--p Sides of the prothorax foliaceous along the whole 
length. 
++ Fore border of the prothorax with a rim. 
& Rostrum slender, extending to the hind border 
of the rnetapectus. - 
Rostrum stout, ex:endiug to the hind border of 
the mesopectus. - 
++++ Fore border of the prothorax with no rim. 
First joint of the hind tarsi ouly a little longer 
than the second and third joints together. 
Mecobhamphus. 
Henestaris. 
Ophthalmicus. 
Plinthisus. 
Drymus. 
IsCHNOCORI8. 
Macrodema. 
Aoploscelis. 
Meoalonotus. 
P'TE ROTMETUS. 
Lasiocoris. 
Peritrechus. 
T ROP1STETHCJS. 
Lamprodema. 
PtONOSOMUS. 
Lasiosoma. 
A com pus. 
Stygnus. 
Homalodema. 
Eremocoris. 
SC0L0P09TETHU8. 
