HEMIPTERA. 131 



* Membrane with longitudi- 

 nal nervures. 



a. Body more or less ovate; 

 antennae with the second 

 joint moderate, cylindri- 

 cal 1. SCIOCORIS. 



/3. Body elongate, linear; 

 antennae with the second 

 joint very long, prismatic 2. MECIDEA. 

 t Membrane with reticulated 



nervures 3. DICTYOTUS. 



b. Scutellum very large, reaching 



nearly to the apex of the body 4. J^DNUS. 

 2. Lateral margins of the thorax 



semicircular, foliaceous 6. DYRODERES. 



b. Rostrum inserted close to the 

 base of the head ; basal joint pass- 

 ing the anterior margin of the 



breast 7- DISCOCEPHALA. 



B. Head lobate or bifid in front. 



a. Lateral margins of the head with 

 a spine in front of the eyes ; late- 

 ral lobes of the thorax broad, with 



the edges smooth 8. DRYPTOCEPHALA. 



b. Lateral margins of the head with- 

 out spines; lateral lobes of the 

 thorax narrow, with the edges 



denticulated 9. CEPHALOPLATUS. 



II. Elytra very short, not furnished with 

 a membrane 5. AEPTUS. 



Genus 1. SCIOCORIS. 



Cydnus, p,, Fall. Mon. dm. (1807). 



Sciocoris, Fall. Hem. Suec. 20. (1829); Hahn, Wanz.i. 194(1831); 



H. Sch. Norn. Ent. i. 37 (1835); Burm. Handb. ii. 3/2 (1835) ; 



Am. # Sen. Hem. 120 (1843); Sahib. Geoc. Fenn. 22(1848). 



* Anterior thighs unarmed, 

 a. Scutellum broad and rounded at the apex. (SCIOCORIS pr.) 



1. SCIOCORIS umbrinus. 



Cimex umbrinus, Wolff, Ic. dm. 142. t. 14. fig. 136 (1804); 



Panz. F. G. 93. 15. 

 Cydnus umbrinus, Fall. Mon. dm. 54. 5 (1807). 



