Silp/ia.] CLAVICOENIA. 51 



1, Thorax red, elytra black ; length 13-16 mm S. tiiouacica, L. 



II. Thorax concolorous with elytra, dull black, or brownish j 

 length 8-10 mm. 

 i. Elytra with the interstices furnished with very strongly 



raised ridges or tubercles, placed transversely S. RtraoSA, L. 



ii. Elytra with the interstices smooth. 



1. Scutellnm finely pubescent, elytra almost without pu- 

 bescence ; base of thorax moderately sinuate S. SINUATA, F. 



2. Scutellum very thickly, and elytra thickly, covered with 



yelli I wish pubescence; base of thorax strongly sinuate . . S.dispau, Rerbsi. 



S. thoracica, L. A large, broad, rather depressed, elliptical species 

 with red thorax and velvety-black elytra, head and thorax clothed with 

 yellow pnbescence ; head black, contracted behind eyes, antennae short 

 with strongly marked fonr-jointed club ; thorax much broader at base 

 than apex, emarginate in front, basal margin not strongly sinuate, pos- 

 terior angles rounded, upper surface very uneven, thickly and finely 

 punctured at sides, more strongly on disc ; scutellum acuminate, some- 

 what concave ; elytra liroader behind than thorax, finely puirctured, Avith 

 the suture and the external keel strongly raised, the latter terminating 

 behind in a strong blunt tubercle, and the internal lines feebly raised 

 until near apex, then stronger and continued to apex ; legs black, rather 

 stout and spinose ; humeral angle of elytra dentate in both sexes, sutuval 

 angle distinctly produced in female, obtuse in male. L. 13-16 mm. 



In carcases, fungi, &c..; also by sweeping ; not uncommon, and generally distributed 

 throughout England, Wales, and Scotland, and probably in Ireland. I have once 

 taken it by sweeping in a wood near L'ncoln on a hot day. 



S. rug-osa, L. An obscure, dark-coloured, species, of an oblong- 

 oval or elliptical shape, with the head and tliorax rather thickly clothed 

 with yellowish-grey pubescence ; antennae short, Avith a strongly marked 

 three-jointed club, the eighth joint also being somewhat dilated ; thorax 

 emarginate in front, basal margin sinuate, sides strongly rounded in front, 

 upper surface thickly and finely punctured, and covered with large and 

 bare, slightly raised, elevations, which are arranged in irregular rows ; 

 posterior angles rounded ; scutellum acuminate, thickly pubescent, except 

 for a bare patch on each side ; elytra with sides subparallel, finely 

 punctured, with the suture and three lines raised, and the interstices 

 furnished with raised elevations or tubercles, placed transversely, apex 

 truncate in male, sinuously produced in female ; legs moderately stout. 

 L. 10-11 mm. 



In carcases, &c. ; the commonest member of the genus in Britain ; generally dis- 

 tributed throughout the kingdom. 



S. sinuata, F. In size and colour, and also in the structure and 

 sculpture of head and thorax, as well as in the pubescence of the same, 

 much resembling the preceding ; it is, however, at once distinguished by 

 the elytra, which are finely punctured, and have the interstices between 

 the ridges plain, and not furnished with transverse raised elevations or 

 tubercles ; in the female the apex is emarginate and very strongly pro- 



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