48 STAPHYLiNiDiE. [Calodem. 



ii. LengHi 2 mm. ; tliirfl joint of tnitennse very sm!ill,"not 



much longer than fourth C. .ETHIOPS, Orav. 



II. Elytra scarcely broader than thorax; form more or less 



linear. 

 i. Upper surface very dull, pitchy brown or reddish ; head 



orbicular; length 3-31 mm C. ETTBEN8, -fir. 



ii. Upper surface shining black or pitchy black'; head almost 



square; length 2-2J mm C. tjmbrosa, ^r, 



C nigrita, Mann. Of a deep black colour, very finely and thickly 

 pubescent ; head nearly as broad as thorax, antennae long, evidently 

 longer than head and thorax together, pitchy with base lighter, third 

 joint plainly shorter than second, 4-6 slightly transverse, the following 

 joints as long as broad, eleventh about as long as the two preceding 

 together ; thoi-ax longer than broad, rather strongly narrowed in front, 

 much narrower at base than base of elytra, with a broad and not deep 

 central furrow, very finely and thickly punctured ; elytra scjuare, longer 

 than thorax, very finely punctured ; hind body almost parallel-sided, a 

 little broader behind, with the second to the fifth segments horizontally 

 impressed at base, the impressions being rugosely punctured, punctuation 

 of the rest of the surface very close and fine ; apex lighter ; legs black 

 or pitchy black with the knees and tarsi reddish testaceous, L. 3|^-3| 

 mm. 



Male with ventral plate of seventh segment of hind body slightly 



prolonged. 



In marshy places ; rare ; Notting Hill and Hammersmith Marshes j Forest Hill, 

 Surrey ; Eeigate ; Hampstead. 



C. riparia, Er. Somewhat similar to the preceding in form, but 

 with the elytra broader in proportion and more convex and the thorax 

 shorter ; the upper surface is deep black or pitchy black, very shining, 

 the extreme apex of hind body being ligbt; head nearly as broad as 

 thorax, antennae long, ferruginous with base lighter ; third joint twice as 

 long as fourth, 5-10 transverse ; thorax about as long as, or slightly 

 longer than, broad, strongly narrowed in front, much narrower at base 

 than elytra, very finely and thickly punctured, with a more or less 

 obsolete impression before scutellum ; elytra hardly longer than thorax, 

 rather more strongly punctured than thorax ; hind body almost parallel- 

 sided, a little broader behind, finely and sparingly punctured, with 

 segments 2-4 impressed at base, the impressions being rugosely punctured ; 

 legs pitchy or pitchy red with the knees, tarsi, and sometimes tibiae 

 lighter. L. 3 mm. 



Male with ventral plate of seventh segment of hind body produced in 



an 



obtuse angle 



o*^ 



In marshy places ; rare; has only been found in the London district and in Scotland, 

 but probably occurs in the intermediate districts; Wimbledon, Shirley, Norwood (in 

 some numbers, Rev. H. S. Gorham), Cowley, Shooter's Hill, Tonbridge ; Scotland, 

 rare, Lowlands, Forth, Solway, and Clyde districts. 



