60 CLAvicoRNiA. . [Choleva. 



2. Thorax slightly sinuate before the posterior 

 auglcs which are usually projecting. 



A. Sixth joint of antenna) always longer thau 

 broad in male, sometimes as long as broad in 

 female; apical joint of autenuaj usually (but 



not always) lighter tliau the rest of the club . C. NIGKITA, Er. 



B. Sixth joint of antenna) always as long as broad 



iu male, sometimes transverse in female ; 

 club of anteunai usually unicolorous. 

 a. Thorax less narrowed behind, with sculpture 



finer C. TEISTIS, Panz. 



h. Thorax more narrowed behind, with sculp- 



ture stronger C. Kibbyi, Spence. 



ii. Pubescence blackish or grizzly ; antenna) short, 



strongly thickened ; size rather large (4-4^ mm.) . C. chkysomeloides, Panz. 

 II. Thorax not narrowed before base, almost semicir- 

 cular ; antenna) short and plainly thickened. 

 i. Club of antenna) narrow ; thorax fully as broad as 



elytra, with somewhat projecting posterior angles . C. FUMATA, Spence. 

 ii. Club of antenna) broader; thorax hardly as broad 



as elytra with posterior angles right angles . . . C. Watsoni, Spence. 



Cm fusca, Panz. Kather a large and broad species, oval, convex, of 

 a dark brown fuscous colour, with the head and the thorax, except 

 margins, darker or even black ; the colour, however, is somewhat variable ; 

 head and thorax very closely punctured, with yellowish pubescence ; 

 antennae long, feebly thickened towards apex, ferruginous; thorax broadest 

 behind middle, much broader thad long at base, posterior angles right 

 angles, slightly projecting ; elytra convex, rather broad, widened in 

 middle, considerably narrowed to apex, very obsoletely striated, thickly 

 punctured ; legs reddish. L. 4-4| mm. 



la dead leaves, garden and haystack refuse, carcases, &c. ; generally distributed 

 throughout England but never abundant; Scotland, in outhouses, not "common, 

 Tweed, Solway, Forth, and Clyde districts ; Ireland, Portmarnock, &c. ; Mr. Bold 

 says that nearly all his specimens from the Northumberland district were found in 

 cellars. 



C. nigricans, Spence. (caliginosus, Steph., favicorms, Thorns. (1) 

 soror, Newm.). Very like the preceding in size and general appearance, 

 but easily distinguished by its darker colour and by the antennae being 

 almost always dark with the base reddish, as well as by the more evi- 

 dently projecting posterior angles of the thorax ; thorax with the greatest 

 width in the middle, very thickly and finely punctured, almost always 

 with two or three more or less obsolete depressions on disc ; elytra oval, 

 convex, thickly and finely punctured, with the striae a little more 

 evident than in C. fusca ; legs reddish-brown, femora blackish. L. 4- 

 4 1 mm. 



In dead leaves, moss, haystack refuse, &c. ; generally distributed throughout 

 England, but never very common ; Mr. Bold is inclined to refer his Northumberhind 

 specimens to Thomson's C. Jlaviconiis, but they probably belong to the variety of 

 C. nigricans with unicolorous reddish antenna), which sometimes occurs ; Scotland, 

 not common, Solway and Forth districts. 



