168 INSECTA MADERENSIA. 



subpunctatis, hoc amplo dentibus sex lateralibus magiiis utrinquc armatOj elytris leviter sub- 



seriato-punctatis, interstitiis alternis (prsesertim versus latera) elevatis, antennis robustis clavatis, 



pedibns rufo-picescentibus, femoribus denticulo minuto subtus miinitis. 



Long. Corp. lin. li. 



Corticaria dentata, Mshm, Ent. Brit. i. 108 (1802). 



Sihanits dentatus, Steph. 111. Brit. Ent. iii. 104 (1830). 



intermedins, Smith, Cat. Ins. Brit. Miis. {Cucujida:) 16 (1851). 



Habitat iu iisdem locis ac prsecedens, saccharinis introductus. 



S. larger, broader, more parallel and depressed than the S. Surinamensis, reddish-brown, pubescent, 

 but not quite opake. Head and prothorax much less deeply and distinctly (although closely) 

 punctured than in that insect : the former with the sides straight posteriorly, and raised from the 

 extreme base to the insertion of the antennse, which causes a longitudinal groove, or depression, 

 to be shaped out at either edge : the latter altogether larger and wider (especially in front) than 

 that of the S. Suri/iamensis, much produced behind (in front of the scutellum), and compara- 

 tively convex, — there being no appearance of ridges, although with two very obscure and shallow 

 curved depressions on the hinder disk, which almost unite posteriorly ; the lateral edges armed 

 each with six powerful teeth, — which are obtuser and wider than those of the last species, the 

 ones which constitute the anterior and posterior angles (although greatly developed) not being 

 quite so long and acute, compared w^ith the remainder, as iu that insect. Elytra more rufescent 

 than the rest of the surface, very lightly subseriate-punctate, and with the alternate interstices 

 (especially towards the margin) elevated. Antenna robust, and much more clavated than those 

 of the last species. Legs bright rufo-piceous ; the two hinder femora being armed beneath with 

 a small and acute tooth. 



Eoiind under the same circumstances as the S. Simnametisis, heing constantly 

 liable to importation, amongst sugar and other saccharine substances, from 

 tropical climates. As with that species, I have never been able, either in Madeira 

 or elsewhere, to detect it in a living state, — it apparently not having succeeded in 

 naturalizing itself in more noi'thern latitudes. 



138. Silvauus advena. 



S. oblougo-ovatus subconvexus pallido-ferrugiueus vel testaccus nitidus, capite prothoraceque minute 

 puuctulatis, hoc convcxo subquadrato, angulis anticis valde ampliato-exstantibus, posticis sub- 

 rectis, elytris vL\ pallidioribus obscure leviter subseriato-punctatis, antennis abrupte clavatis. 



Long. Corp. lin. 1. 



Cryptophagm ferruyineus, Sturm, Cat. 127 (1826). 



advena, (Kunze) AValtl, in Silb. Bev. Ent. ii. 256 (1834). 



Silvanus ferrugineus, Sturm, Cat. 235 (1813). 



advena, Erich. Nat. der Ins. Deutsch. iii. 339 (1848). 



, Stiu-m, Deutsch. Fna, xsi. 100. tab. 390. f. B. (1851). 



Habitat in granariis domibusque Madei-je, rarior, — forsan cum frumentariis in insulam invectus. 



S. smaller, broader, more ovate and convex than either of the previous species, pale nifo-ferruginous 



