OF AMERICA NORTH OF MEXICO. 151 



New York ; one specimen. The elytra are quite rough towards the base : the 

 smallness of the thoracic spines will enable this species to be recognised at once ; the 

 usual transverse impressions of the thorax are hardly visible. 



PLECTRODERA ^Dej. 



Corpus alatuDC. 



Os non productum, pal pis articulo ultimo truncato. 



Mesosternum planum. 



The body is stouter than in Goes, with stronger thoracic spines. The inferior 

 margin of the head behind the mentum is straight, not rounded as in Goes : and the 

 chin is more deflexed, thus showing an approximation to the ^diloid Lamite. The 

 males are only distinguished by longer antennse. 



1. P. SCALATOR, supra nigra nitida, parce punctata, capite albo-variegato, thoraee marginibus vittisque duabus 

 niveo-pubescentibus scutello, eljtrorum sutura margine, lineolisque transversis pluribus niveo- 

 pubescentibus, subtus albo-pubescens pedibus cinereis. Long. 1-07 — 1-45. 



4Dej. Cat. jHald. 52. 



Lamia scalator Fabr. Ent. Sjst. Syst. El. 2, 295. Lee. Bost. Journ. 5, pi. 18. 



Ceramhyx scalator Oliv. 67. 172. 



Lamia Bellii Lee. Bost. Journ. 5, 209. 



Louisiana and Rocky Mountains ; common. My error it seems was discovered 

 too late for correction in the Bost. Journal, and thus the description and figure appear 

 under different names. 



Group 8. 



Before proceeding to the Dorcaidioid Lamise, to which the sixth group seems 

 naturally to lead, we must, in order to complete the Lamise having the external 

 margin of the anterior acetabula angulated, take up the Saperda series. The present 

 group commences this series with genera having a short convex front ; the antennfe 

 are widely separated ; the last joint of the tarsi is shorter than usual, and the claws 

 are most frequently bifid, or toothed. The thorax has two transverse impressions, 

 sometimes so strongly marked that the sides become tuberculate. The mentum is 

 trapezoidal, and membranous at the apex ; the labial palpi are either approximate 

 (Oberea) or distant (Tetraopes). 



OBEREA Mulsant. 



Antennffi non pilos:» artieulis a 3'° gradatim brevioribus. 



Tarsi lati, breves, unguiculis basi obtuse dentatis. 



Palpi maxillares articulo penultimo breviore, ultimo truncato. 



Tibiae breves, extus modice inerassatje, intermedioe margine externo sinuate. 



