1854.] 77 



Telephanus Er. 



1. T. v el ox. Heterodromia velox Hald. Proc. Acad. Nat. Sc. 3, 127. Psam- 

 machus (velox) Hald. Proc. Acad. Nat. Sc. 3, 348. Telephanus atricapillits\ Er. 

 Ins. Deutschl. 329. 



Middle, Southern and Western States, under stones and pieces of wood. This 

 species is named in Dr. Harris' collection, ie Orsodacna? pallida Say," which 

 name is quoted by Schaum (Bericht, &c, 1851) as having priority, but I have 

 not been able to find any description of the insect among Say's publications. 



Silvanus Latr. 



A. Thorax lateribus sexdentatis. 



1. S. dentatus Say, Journ. Acad. Nat. Sc. 5,265. Mann. Bull. Mosc. 

 1852, 303. Lyctus dentatus Fabr. Ent. Syst. emend. 1, 2. 503; Syst. El. 2, 561. 



Found, but not abundantly, throughout the United States, usually in rice, 

 sugar and other articles of commerce. According to Fabricius, it is found in 

 South America, and according to Mannerheim in Russian America. 



2. S. surinamensis Steph. 111. Brit. Ent. Mandibulata, 3, 1 14. 



For the synonyms of this common insect, see Erichson's Ins. Deutschl. 336. 

 It is now diffused over the whole globe in articles of commerce. Erichson adopts, 

 from Fabricius, the specific name frumentarius for it, but the oldest des- 

 cription is certainly that of Linnaeus. Of the descriptions by the older authors, 

 the chronological succession is as follows : 



Dermestes surinamensis Linn. Syst. Nat. (ed. 12mo reform. 1767) 2, 565. 



Tenebrio surinamensis De Geer Mem Ins. (1775) 5, 54, tab. 13, fig. 12. 



Colydium frumentarium Fabr. Ent. Syst. 62, (1775) id. emend. 1, 2, 496. 



Dermestes sexdentatus Fabr. Ent. Syst. emend. (1792) 1, 232. 



B. Thorax lateribus haud dentatus. 



a. Caput pone oculos denticulo armatum. 



3. S. b identa t u s, linearis, depressus, opacus ferrugineus. subpubescens, 

 thorace confertim punctulato, elongato, postice angustato, angulis anticis spino- 

 sis, lateribus crenulatis, dorso obsolete bisulcato. elytris punctato-striatis ; capite 

 pone oculos denticulato. Long. -12. 



Erichson, Ins. Deutschl. 338. 

 Dermestes bidentatus Fabr. Syst. El. 1, 317. 

 Colydium sulcatum Fabr. Syst. El. 2, 555, (teste Erichson.) 

 A European species, which occurs in the Middle and Southern States. The 

 sides of the thorax are very slightly sinuous. 



4. S. pi ana tus, linearis valde depressus, opacus, ferrugineus, subpubescens, 

 thorace confertim punctato, elongato, pone medium sinuatim angustato, angulis 

 anticis subspinosis, lateribus obsolete crenulatis, elytris confertim punctato- 

 striatis ; capite pone oculos denticulato. Long. *12. 



Germar, Ins. Nov. 466. 



Silvanus Zimmermanni Guerin, Icon. Regne An. 198. 



Southern States and Nebraska. The outline of the thorax is slightly concave 

 before the middle, with the sides nearly parallel ; behind the middle ihey con- 

 verge, so that at the middle they form, a very obsolete angle ; the anterior angles 

 are hardly prominent, and the posterior ones are obtuse, but not rounded. 



5. S. cognatus, linearis valde depressus, subnitidus ferrugineus, subpubes- 

 cens, thorace confertim punctato, obsoletius in disco, elongato, ab apice sensim 

 angustato, lateribus crenulatis fere rectis, angulis anticis acutis parum productis, 

 elytris punctato-striatis ; capite pone oculos denticulato. Long. -10. 



Southern States ; closely resembles the preceding, but the sides of the thorax 

 are straight, and the anterior angles, though short, are more acute ; the posterior 

 angles are obtuse. 



b. Caput pone oculos haud denticulatum. 



6. S, i m b e 1 1 i s, linearis, depressus, fere opacus, ferrugineus subpubesceus^ 



