British Species of Genus Acanthosoma. 113 



elytra and the base of the scutellum have some patches of black 

 punctures. Membrane hyaline, with a brown spot near the middle 

 of the base, and a brown band across near the middle. Body 

 beneath and legs yellowish or pale green. Antennae yellow, pale 

 green or reddish, with the apex dusky. Length 5 — 6 lines. 



In the male the anal plate is broadly emarginate at its apex, 

 but not denticulated ; in the female, the basal and intermediate 

 plates form together a nearly perfect circle ; the basal plates are 

 larger than the apical, and these again larger than the intermediate. 



B. Head rounded in front, lateral lobes as long as the central. 

 Margins of the abdomen projecting beyond the elytra, variegated 

 with black and orange. 



Sp. 4. Acanthosoma griseum. 

 Cimex griseus, Linn. F. S. 926 (1761), and S. N. i. 721, 43 



(1767). 

 Cimex inter stinctus, Linn. F. S. 927 (1761), and S. N. i. 721, 

 44 (1767); Fab. E. S. iv. 116, 141 (1794), and S. R. 171, 

 88, (1803). 

 Cimex Betulce, De G. Mem. iii. 261, 8, pi. 11, fig. 9 (1773). 

 Cimex agathinus, Fab. E. S. iv. 114, 133 (1794), and S. R. 170, 

 82 (1803) ; Fall. Mon. Cim. 45, 5 (1807), and Hem. Suec. 

 24, 5 (1829) ; Zett. Faun. Lapp. i. 464, 4 (1832), and Ins. 

 Lapp. 260, 4 (1840). 

 Cimex achatinus, Wolff, Ic. Cim. 58, tab. 6, fig. 55 (1801). 

 Acanthosoma agathinum, H. Schaff. Cont. Panz, F. G. 114, 10, 



11, and Norn. Ent. 57 and 94 (1835). 

 Acanthosoma grisea, Burm. Handb. ii. 360, 6(1835); Sahib. 



Geoc. Fenn. 33, 2 (1848). 

 Acanthosoma inter stinctum, Kolen. Mel. Ent. iv. 61, 189 (1846). 

 Meatus, Amyot, Ann. Soc. Ent. Fr. 2me. ser. iii. 457, 74 



(1845). 

 Above pale olive green, more or less clouded and variegated 

 with red, thickly and rather strongly punctured with black ; 

 sometimes entirely of a pale brick red. Scutellum with a large 

 blackish or dark brown triangular patch at its base. Membrane 

 hyaline, more or less clouded with brown. Body beneath and 

 legs pale yellow ; stigmata black. Antennae concolorous with the 

 legs at the base, becoming brownish towards the apex, with the 

 apical joint pitchy brown. Length 4 lines. 



In the male the anal plate is very small and not denticulated 

 on its apical margin ; in the female the basal plates are semicir- 

 cular and larger than the apical ; the intermediate plates smallest. 



VOL. 1. N. S. PART IV. MARCH, 1851. I 



