OF AMERICA NORTH OF MEXICO. 319 



RHAGIUM, Fabr. 



Oculi parum promlnuli, oblongi, intus paulo emarginati. 

 Prosternum inter coxas prominulum gibbum, pone coxas vix deficiens. 

 Mesosternum breve, gibbum, postice emarginatum. 

 Palpi dilatati. 

 Corpus depressiusculum ; caput longe pone oculos modice constrictum ; antennae anteoculos insertae, breves; 



mandibulae unidentatae. Mentum trapezoideum vix transversum. Thorax acute spinosus, utrinque 



modice constrictus. Tibias apice recte truncatae, calcaribus ad apicem sitis. 

 R. LiNEATUM. — Nigrum punctatum, griseo-pubescens, thorace linea dorsali laevi, elytris tricostatis, testae eo 



marmoratis, obsolete nigro-bifasciatis, antennarum articulo 5'° elongato, 4- pracedente paulo breviore* 



Long. -SI.— 72. 

 Sch. Syn. 3, 414. Kb. N. Z. 178 : Hald. 58. 

 Stenocorus lineatus, 01. 4, 69, 22. 



Maine to Chihuahua. Under pine bark. Abundant. 



ARGALEUS. 



Oculi majuscuH, parum promlnuli, sub-transversi, antice emarginati, postice oblique truncati. 

 Mesosternum angustum acutum. 



Caput elongatum, ore attenuato, postice vix constrictum. 

 Tibloe apice recte truncatae, calcaribus ad apicem sitis. 

 Corpus utrinque angustatum, maris gracilius. Mandibulae edentate, antennae ante oculos insertae, lono'ae, 



articulo 4'° oreviusculo, 5'" elongato. Mentum vix transversum, lateribusrotundatum, antice truncatum. 



Thorax utrinque constrictus, acute tuberculatus : elytra postice angustata, apice subtruncata. 



This genus is very near to Rhamnusium, but the head is not blunt ; the form is 

 similar to Rhagium. Toxotus cursor of Europe must be referred here. 



§1. Palpi labiales articulo ultimo subtransverso, securiforfni. 



1. A. NiTENS. — Niger, punctatus, pube longa tenui albida vestitus, capite parvo, canaliculato, tuberculo 



lateral! apice obtuso, elytris testaceis, glabris, disco saeplus infuscato, apice oblique truncatis. 

 Long. •63. 

 Lee. Agass. Exp. 



Found at the mouth of Pic River, Lake Superior. If Kirbj had not compared hi.s 

 Pachyta litiirata with the European P. ^-maculata, (which belongs to the thirtl 

 group of this family,) I should have referred my specimens to his species. 



§2. Palpi labiales articulo ultimo longiusculo, triangulari. 



2. A. ATTENUATUS. — Niger, punctatus densius griseo-pubescens, capite magno subtiliter canaliculato, 



thorace paulo latiore canaliculato, disco utrinque longitudinaliter elevato, tuberculo lateral! acuto 

 elytris testaceo marmoratis, inequallter pubescentibus, apice recte truncatis. Long. -60. 



Lee. Ag. Exp. 



Pachyta attenuata, Hald. 1. c. 



81 



