HKMIPTERA HETEItOPTKIU. 57 



I Second joint of the rostrum twice longer than 



the first. Femora carinate-nudulose. Fore 



femora especially clavate. - Peprius. 



$ Second joint of the rostrum a little longer than 



the first. Femora very slightly nodulose, 



not clavate. - Vesbius. 



ft Post-ocular part of the head sometimes more 

 than twice longer than the ante-ocular part, 

 often shorter. Eyes more or less remote 

 from the tip of the head. 

 I Head oval, shorter by nearly the half than the 

 prolhorax. Prothorax flat ; sides ridged, 

 not obtusely convex. - Phon-octonos. 



# Prothorax rarely flat; head in that case hardly 



or but a little shorter than the prothorax. 

 § Hind lobe of the prothorax angularly extended 



hindward, covering the scutellum. - - Panthous. 



§§ Hind lobe of ihe prothorax not extended hind- 

 ward, not covering the scutellum. 

 X First joint of the rostrum longer than the second. 

 Prolhorax flat ; fore lobe with a conical 

 tubercle on each side at the base ; disk 



unarmed. ----- Isyndus. 



X X Prothorax, the fore lobe especially, more or less 

 convex, this lobe with no conical tubercle on 

 each side at the base. 

 o Side angles of the hind lobe of the prothorax 

 acute, prominent, or armed with a spine. 

 -+ First joint of the rostrum longer than the 



second, or the two almost equal in length, 

 f* Post-scutellum angularly prominent behind the 



scutellum. 

 *y First joint of the rostrum longer than the third 



and fourth. Scutellum unarmed. - - Dalybta. 



«*«* First joint almost as long as the third and 



fourth. Scutellum spiny. - - - Alcmena. 



♦+•»••► Post-scutellum not or hardly and never angu- 

 larly prominent behind the scutellum. 

 k" First joint of the rostrum a little longer than 



the third and fourth together. 

 + Body oblong-ovate. Hind lobe of the prothorax 

 with two compressed tubercles. Abdomen 

 somewhat dilated, especially in the middle. Astinus 



-J-- f- Body elongate. Hind lobe of the prothorax 

 unarmed or with two spines in the disk. 

 Antenna? and legs long, slender. Fore 



tibia almost as long as the femora. - Lndochus. 



^wr> First joint of the rostrum shorter than the 

 third and fourth together, or equal to them 

 in length. Hind lobe of the prothorax with 

 four spines. 



