OF AMERICA NORTH OF MEXICO. 161 



2. E. EXiGTJXis, fuscus, brcvius cinereo-pubescens, thorace vix punctato, elytris grosse subseriatim punctatis, 

 fusco-nebulosis, lineis tribus vix elevatis obscuro breviter penicellatis, apice vix truncatis, antennis 

 testaceis, vix annulatis. Long. -18. 

 Exocentrus exiguus ^Dej. Cat. ^Hald. 50. 



One specimen from Georgia ; this species is not described by either of the authors 

 who have mentioned it ; it is much smaller than the preceding. The thorax has 

 only a few punctures at the sides, and the apex of the elytra is very indistinctly 

 truncate. 



ADETUS. 



Antennae breviusculae, paree pilosae, articulis a 5'° sequalibus. 



Frons inflexa, convexa ; epistoma corneum. 



Oculifere divisi. 



CoxEe antica; ad prosterni marginem anteriorem approximatae. 



Mesosternum gibbum. 



This very remarkable genus has a cylindrical body ; the elytra are scarcely wider 

 than the thorax, which is a little narrowed in front, and entirely destitute of 

 impressions, the front is broad and elongate, a little convex, and without the 

 transverse suture, which in most Lamise separates the membranous epistoma. The 

 femora are moderately thick but scarcely clavate : the tarsi broad, the three first 

 joints equal, the fourth thin, moderately short, with simple ungues. 



1. A. ANALis, piceus, subnitidus, parce sordide pubescens, thorace antrorsum subangustato, grosse punctato, 

 lateribus, vittaque ad medium cinereis, elytris parce grosse punctatis, macula rotunda apicali nigerrima, 

 antice albo-marginata. Long. -47. 

 PoJijopsia analis Hald. 57. 



Penn.sylvania. Through the kindness of Dr. Melsheimer I have been able to 

 examine this insect, which differs so remarkably from the other genera of this group, 

 that it should perhaps be properly placed by itself. 



Group 10. 

 This group contains the typical Saperdse : they are distinguished from all other 

 groups with angulated anterior acetabula by the short terminal joint of the tarsi, the 

 cylindrical thorax, and the large flat front ; the antennae are setaceous and widely 

 separated : the front between them is not at all concave. The claws of Saperda are 

 simple. The male, however, has the internal claw of the anterior tarsi armed with a 

 stout basal tooth. I am in doubt if this peculiarity extends to allied genera, or in 

 fact whether any other genus should be associated in this group with Saperda. 



SAPERDA Fabr. 



Antennfe vix pilosoe, vel non pilosa;, sctacete, articulis a 4'" vix brevioribus. 



Palpi tenues, truncati, articulo penultimo non breviore. 



Tarsi unguiculis integris, postici articulo 1"'" saepius longiore. 



Frons perpendicularis, magna, plana. 



41 



