HEMIPTERA. 61 



Fam. 5. PLATASPID^E. 



Body generally rounded, not triangular in front. Thorax with 

 the lateral margins rounded, not angular. Scutellum covering 

 the whole of the elytra, except a very narrow portion of the base 

 of the outer margin. Elytra folded in at the base of the mem- 

 brane, so that, when extended, they are much longer than the 

 scutellum. Tarsi two-jointed. 



Thyreocorides, Am. Sf Serv. Hem. 60 (1843). 



Totovuli, p., Amyot, Ann. Soc. Ent. Fr. 2 me ser. hi. 416 (1845). 



TABLE OF GENERA. 



I. Head small, narrower than the anterior 

 margin of the thorax. 



1 . Body hemispherical, not widened 



posteriorly 1. CHL^NOCORIS. 



2. Body wider behind than in front. 2. COPTOSOMA. 

 B. Eyes pedunculated. Thorax gib- 

 bous in front 3. PROB^ENOPS. 



II. Head broad, as wide as the anterior 

 margin of the thorax. 



A. Lateral margins of the thorax not 



dilated, continuous with the mar- 

 gins of the head and scutellum. 



1. Ocelli about as far apart from 



each other as from the eyes .... 4. BRACK YPLATYS. 



2. Ocelli placed close together at 



the posterior margin of the head. 5. HETEROCRATES. 



B. Lateral margins of the thorax di- 



lated, not continuous with those 

 of the head and scutellum. 



1. Body rather flat 6. CANTHARODES. 



2. Body very convex. 



a. Head very large, with the la- 

 teral lobes produced on each 

 side into strong, flat horns; 



central lobe concealed 7- CERATOCORIS. 



b. Head smaller, rounded in 



front ; central lobe visible . . 8. PLATASPIS. 



