HEMIPTERA. 485 



.Family 7 '. COREIUJS. 



Head either square or triangular. Antennae with the basal 

 joint as long as, or longer than, the head*, the apical joint 

 shorter than the preceding, and generally thickened. 



Homeocerides, p., Syromastides, Acanthocorides, p., Alydides, p., 

 et Coreides, Am. fy Serv. Hem. (1843). 



TABLE OF GENERA. 



I. Thighs either unarmed or heset through- 

 out with fine spines ; posterior pair 

 not thickened. 



A. Body elongated, linear. 



a. Antennae with the basal joint thick- 

 est, not clavate; the remainder be- 

 coming gradually thinner to the 

 apex of the antenna. 



1. Basal joint of the antennae not 



longer than the head 1. CHOROSOMA. 



2. Basal joint of the antennae 

 nearly as long as the head and 

 thorax ; central lobe of the head 



much produced and pointed . . 2. ACESTRA. 



b. Antennae very slender, with the 

 basal joint clavate, and the apical 

 joint ovate ; thighs clavate. 



1. Head with a lamella between 



the bases of the antennae 3. NEIDES. 



2. Head short, without a lamella. . 4. METACANTHUS. 



B. Body broad, more or less ovate or 

 foliaceous. 



a. Body dilated, foliaceous 5. PHYLLOMORPHA. 



b. Body more or less ovate. 



1 . Head unarmed in front. 



a. Antennae very long and slen- 

 der, with the basal joint very 

 long, and suddenly clavate at 

 the apex 6. HYDARA. 



/3. Antennae shorter and stouter, 

 with the basal joint stout, not 

 suddenly clavate. 

 * Rostrum rather long, reach- 

 ing or passing the middle 



* In one species of the genus Chorosoma, the basal joint of the an- 

 tennae is shorter than the head. 



