SOt CLAVICORNIA. [Silvcinus. 



i. Dull; thorax much longer than broad; anterior angles 



produced in a very strong sharp point. 

 1. Elytra depressed, about as broad as thorax, antennas 



shorter and stouter S. BIDENTATUS, F. 



2 Elytra convex, distinctly broader than thorax, antennae 



longer and more slender S. SlMitlS, Er. 



S. surinamensis, L. (frumentarius, F. ; sexdentatus, F.). Narrow, 

 almost parallel-sided, depressed, fuscous brown, rather thickly clothed 

 with fine greyish-yellow pubescence ; head a little narrower than thorax, 

 rather large, narrowed in front of antennae, very thickly and deeply punc- 

 tured ; antennae rather stout ; thorax slightly narrower than elytra, longer 

 than broad, serrate at sides, with three distinct raised keels, very thickly 

 punctured ; the anterior angles project in a more or less strong point, 

 which is however not, or not much, more pronounced than the preceding 

 denticulations ; elytra rounded at apex, with regular punctured strice, 

 alternate interstices elevated ; legs ferruginous. L. 3 mm. 



In sugar, dried figs, rice, &c. ; an introduced and cosmopolitan species; London, 

 Dubliu, and other towns, not uncommon ; it is, however, occasionally found at a dis- 

 tance from habitations. Mr. Bold remarks that in warm seasons it becomes so numerous 

 in many grocers' shops in Newcastle as to be a nuisance, rendering unsightly the 

 sugar and dried fruits among which it lives and breeds. Professor Westwood sajs 

 that he has specimens from Yorkshire, Epping Forest, and Scotland, taken under bark 

 of trees. 



S. unidentatus, F. Rather shining, reddish-yellow or brownish- 

 red, with very short and fine yellowish pubescence ; head triangular 

 narrowed before eyes, antennas with a plainer club than in the preceding 

 species-; thorax a little longer than broad, anterior angles produced in a 

 distinct but not very elongate point, with sides not serrate and narrowed 

 behind, together with head very thickly punctured, posterior angles den- 

 ticulate ; elytra with very close punctured striae, interstices very narrow ; 

 legs ferruginous. L. 2f mm. 



Under bark of beech, oak, hornbeam, &c. ; local, but often common where it occurs ; 

 London district, widely distributed ; New Forest ; Exeter; Stretford, near Manches- 

 ter (flying) ; not recorded from Scotland or Ireland ; the localities known for this 

 species seem to show that it has been introduced, and has to a certain extent natural- 

 ized itself. 



S. bidentatus, F. (laricis, Chevr.). Very like the preceding, but 

 larger and evidently duller ; the anterior angles of thorax are produced 

 into a longer, sharper, and evidently more distinct tooth ; the thorax is 

 longer and narrower, and has two shallow longitudinal grooves ; the joints 

 of the antennae are longer and the club is more marked, and the tibiaa 

 are less dilated at apex. L. 3 mm. 



Under bark ; very rare ; Dunham Park, Manchester, under bark of a large branch 

 of oak which had been broken off in a gale (Chiippcll) ; Newcastle, very rare (Bokl) ; 

 Paisley, one specimen under fir bark (Morris Young). 



S. similis, Er. (fayi, Guer.). Allied to S. vnideniatus, but easily 



