HEMIPXEHA HETEKOPTERA. 



83 



I Head before the eyes with a broad process, which 

 is emarginate in front. Scutellum with an 

 obtuse tooth on each side at the base. - Cethera. 



JJ Scutellum unarmed at the base, with an erect 



spine on the disk. - Macrops. 



ff Head longer than its breadth with the eyes. 

 X Head with a rather long cylindrical neck. First 

 joint of the rostrum as long as the third 

 and fourth together. Fore tibiae with hardly 

 any spongy furrow, that of the middle tibiae 

 small. -_-.- Centrocnemis. 



JJ First joint of the rostrum shorter than the third 



and fourth together. 

 § Scutellum spiny on each side at the base. - Platymeris. 



§§ Scutellum unarmed at the base. 

 X Fore lobe of the protliorax with two spines or 



tubercles on the disk. 

 o Fore lobe of the protborax unarmed on each side 



at the base. ----- Tetroxia. 



oo Fore lobe of the protborax with a spine or tubercle 



on each side at the base. 

 -+ Ocelli far from the eyes. - Spiniger. 



H — 1- Ocelli near the eyes. Second joint of the rostrum 

 hardly longer than the first. First joint of the 

 antenna? hardly extending beyond the bead. 

 Fore angles and hind angles of the protborax 

 with a spine. Scutellum with an oblique 

 apical spine. Legs long, slender; fore femora 

 unarmed, not incrassaled. Spongy furrow of 

 the fore tibiae elongated. ... Vellejus. 



XX Fore lobe of the protborax unarmed on the disk. 

 o Ocelli large, very near the eyes. 

 -3- Second joint of the rostrum much longer than the 



first. ------ Opsicoetcs. 



h — y Second joint of the rostrum hardly or a little 



longer than the first. - Varus. 



oo Ocelli remote from the eyes, 

 -r Fore coxae distinctly prominent near the hind 



border of the prostetbium. 

 *+ Femora unarmed on each side beneath at the 



extreme tip. 

 u?» Ante-ocular and post-ocular parts of the head 

 equally long, or the post-ocular shorter than 

 the ante-ocular. - Acanthaspis. 



k^«^ Ante-ocular part of the head a little longer than 

 the post-ocular, which is slightly swelling. 

 First joint of the antennae short, hardly reaching 

 the tip of the head. First joint of the rostrum 

 and ante-ocular part of the bead equally long; 

 second joint somewhat longer than the first. - Pasira. 



++++ Femora on each side beneath at the extreme 



tip with a little spine or small acute tooth. - Leogorkus. 



