NORTH AMERICAN COLEOPTERA. 



105 



• l.'ifc to adinif of 



otlicrwisc rosv.iu- 



ff'ort'uf. 



1 species of this 



'1 quite eonfidont 



iDiTison. 



'onte, as a slight 



deserib(?d. 



rotiidriix siili-(?v- 

 iiisvei-se. cilialeii 

 fiixilhie l)ilobe(l. 

 itf'i at tlie biise; 

 iibnuKiiifi. Legs 

 •■"iieioiis ill the 

 itUo longer and 

 (liirvi. last elon- 



ilhcscencc innd- 

 itli'ira.v. Piiiic- 

 ' iippnixiijiato: 

 "I'iix exhibits a 



: narrow lines 

 HI) t-lio base to 

 liqiiely toward 



s.'iiiie time be- 

 l:ilor: 1 grooves 

 f>ostorioi- inar- 

 " wi(l(,li across 

 I'M convergin"- 

 sties. Elytra 

 si<ies slighdv 

 'id pro! borax 

 I'seiy behind : 



oral oi'ijan.s, 

 iiilar in its 

 ^I'li in this 



country from the I>acific Coast were und()u!)tedly })roujrht in articles of 

 coniincrce. It has also heen descrihed from Madagascar. St, Helena anu 

 Madeira, and under three difterent iri'nerie names. 



XoTK.— Lest some aniliiguity iriay be apparent in the use of the term "mar- 

 gined" as used with reference to the protliorax in the preceding pages, it mav be 

 stated that in all my writings it will be iimler.stood to mean that the protliorax is 

 limited laterally by a narrow surface, which is usually raised, but which in some 

 eases may be continuous in elevation with the gentTal surface and limited inter- 

 nally by a striated or grooved line. 



Again when the term " edge" is employed in describing the pronotum. it will 

 have reference to the boundaries of that part when considering the vertical cross- 

 section, and the jihrase would then road "edges acute." or "edges rounded." 

 When the term " side" is sp.iketi of, it w'U relate lo thecimfortnation of the lateral 

 boundary of the pronotum with reference to its nature as a- line, this line being the 

 horizontal projection of the boundary as seen when viewed i)erpendicularlv, and 

 the i)liraseology to be employed will be "sides arcuate, straight or sinuate," or 

 various modifications of these terms. 



These matters are brought uj) at this time in < rder, if possible, to render the 

 phraseology a little more concise and uniform. A striking example of this want 

 of uniformity, is seen in the use of the term " margined." Dr. Sharp using the 

 word as defined above, while one or two of our leading coleoj)terists have u.sed it 

 to indicate that the edges of the pronotum are a;ute. which is evidently an abnor- 

 mal use, and one. the meaning of which, would be decidcilly unintelligible to a 

 person not familiar with this particular employment, however well-versed he 

 might be with its usual signification as an English word. 



In the case of Narthen'ii.i, as defined in the tabic i>t' gene-'a composing Grouj) I 

 of the Cucujinue, the expression " jirotliorax margined," has reference to the sur- 

 face included between the lateral striae and the sides of the pronotum, and per- 

 haps it would be less ambiguous to say in this case that the prothorax is striated 

 in Xartherius and not slr;ate<l in Pedianis, because of the comparatively great 

 distance between these striae and the sides in the former genus. 



Bibliography and Synonymy. 



SILVANUS. 



Latr. (ien. Crust, et Ins. III. p. 20, 1S07. 



Lep/ii.1 Duftsch. Faun. Aiis. III. s. lafi. 

 S. surinamensis ( liinn), Syst. Xat. I, II, !,i)b. 2i>. 

 Dermextes sitrinamen.'iis Linn, .Syst. Nat. 1. c. 

 Tenebrio xurinamenxis Degeer. Ins. V, 54, ,5. 

 DermeMei^ acxdentatiis Fab. Syst. El. I, .317, 2o.— Panz. Faun, tierm. 14, 11. 



niisson Ann. Fr.. 1n49, p. Ifi."). 

 Ipx/riimentaria. Oliv. Ent. II, 18, It), 14. 

 Coli/dium frumenlarium fab. Syst. El. II, :>:>7, 11. — Ilerijst. Kiif. VII, 28:5, 4. 



■rniNS. AMKIl. KMT. SOC. XI. (27) PKBRUARV, 1884. 



