British Hemiptera-Heteroptera. 633 



Closely allied to riparia, Fall. ; but differs in the colour 

 and shape of the markings, and in the shorter 2nd joint of 

 the antennse. 



9. marginalis. Fail. (PI. XII. fig. 6.) 



Small and roundly oval ; dull black, with scattered, short, 

 silvery-white hairs. Head, thorax and scutellum very 

 finely rugose, the thorax scarcely impressed at the sides. 

 Elytra black ; its sides, except at the extreme base and 

 apex, pale; the colour spreading at the apex, and gene- 

 rally also above the middle; membrane obscure. Thighs 

 pitchy brown, the apices paler; tibise and tarsi testaceous, 

 their extreme apices black. Antenna?: 1st and 2iid joints 

 testaceous; the other two obscure brownish-black. 



Length 1| line to 1^ line. 



Rare ; Chobham Common, August, 1875, and Dor- 

 chester, in damp spots on the heath. 



A most distinct species. 



10. opacula, Zett. (PI. XII. fig. 13.) 



Elongate oval, black, sides of the thorax widely im- 

 pressed. Scutellum and clavus with golden hairs, the 

 latter with an obscurely pale spot near the apex. Corium 

 with a few obscure pale markings ; lateral margin, except 

 at the base and extreme apex, narrowly testaceous ; mem- 

 brane obscure, its outer margin testaceous ; nerves black ; 

 legs testaceous ; apex of tibite and tarsi black ; antennas 

 obscure. 



Length 1^ line. 



Rare ; Scotland, Braemar. 



11. C-album, Fieb. (PL XII. fig. 2.) 



Shorter and more regularly oval than most of the 

 species of this genus; rather densely covered with golden 

 hairs. Head and thorax bronzy-black, with the sides 

 straight or nearly so; discal impression very shallow but 

 well defined. Elytra with the sides much rounded; 

 clavus with a small yellow spot at the apex ; corium with 

 a large yellow spot on the middle of the lateral margin 

 and a smaller one near the apex, and with several irregular 

 yellow and whitish mai'ks on the disk; near the apical 

 angle is a small, round, white speck. Membrane yellowish, 

 the nerves and a spot between each pair black. Legs 

 testaceous ; thighs irregularly spotted ; tibiae black at the 



TRANS. ENT. SOC. 1876. PAKT IV. (DEC.) T T 



