44 HEMIPTERA. 



TABLE OF GENERA. 



I. Body convex or subconvex. Scutellum 

 covering nearly the whole abdomen. 



A. Tibiae spinous 1. PSACASTA. 



B. Tibiae unarmed. 



1. Lateral angles of the prothorax . un- 

 armed 2. BOLBOCORIS. 



2. Lateral angles of the prothorax very 

 prominent. 



a. Anterior margin of the breast pro- 

 duced 4. TRIGONOSOMA. 



b. Anterior margin of the breast not 



produced 3. ANCYROSOMA. 



II. Body subdepressed. Margins of the 

 abdomen projecting considerably beyond 

 the scutellum. 



A. Second joint of the antennae not much 



longer than the third 5. EURYGASTER. 



B. Second joint of the antennae at least 



twice as long as the third 6. GRAPHOSOMA. 



Genus 1. PSACASTA. 



Cimex, p., Rossi, Faun. Etr. ii. (1 790); Fab. Ent. Syst. iv. (1794). 

 Tetyra, p., Fab. Syst. Rh. (1803); Burm. Handb.n. (1835); 



H. Sch. Norn. Ent. (1835) ; Ramb. Faun. And. ii. (1841). 

 Ventocoris, p., Hahn, Wanz. ii. (1834). 

 Psacasta, Germ. Zeits. i. 68 (1839) ; H. Sch. Wanz. v. 46 (1839) ; 



Am. fy Serv. Hem. 45 (1843). 



1. PSACASTA tuberculata. 



Cimex tuberculatus, Rossi, Faun. Etr. ii. 229. 1294 (1790) ; Fab. 



E. S. iv. 90. 45 (1794). 

 Tetyra tuberculata, Fab. S. R. 139. 52(1803); H. Sch'dff. Cont. 



Panz. F. G. 135. t. 2, & Nom. Ent. i. 53 & 90 (1835) ; Ramb. 



Faun. And. ii. 98. 3 (1841). 

 Psacasta tuberculata, Germ. Zeits. i. 70. 2 (1839) ; H. Sch'dff. 



Wanz. v. 46 (1839); Am. $ Serv. Hem. 46. 2 (1843). 

 Oncopygia, Amyot, Ann. Soc. Ent. Fr. 2 me ser. iii. 405. 6 (1845). 

 a. . 



2. PSACASTA conspersa. 



Psacasta conspersa, Germ. Zeits. i. 71. 4 (1839). 

 a. Odessa. Presented by Dr. Dowler. 



