OF AMERICA NORTH OF MEXICO. 
319 
RHAGIUM, Fahr. 
Oculi parutn prominuli, oblongi, intus paulo emarginati. 
Prosternum inter coxas prominulum glbbum, pone coxas vix deficiens. 
Mesosternum breve, gibbum, postice emar^inatum. 
Palpi dilatati. 
Corpus depressiusculum ; caput longe pone oculos modice constrictum; antennae ante oculos insertoe, breves; 
mandibulae unidentatoe. Mentura trapezoideum vix transversum. Thorax acute spinosus, utrinque 
» modice constrictus. Tibiae apice recte truncatae, calcaribus ad apicem sitis. 
R. LiNEATOM. — Nigrum punctatum, griseo-pubescens, thorace linea dorsali laevi, elytris tricostatis, testaceo 
marmoratis, obsolete nigro-bifasciatis, antennarum articulo 5‘® elongate, 4 praecedente paulo breviore* 
Long. '31.—-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 majusculi, parum prominuli, sub-transversi, antice emarginati, postice oblique truncati. 
Mesosternum angustum acutum. 
Caput elongatum, ore attenuate, postice vix constrictum. 
Tibiae apice recte truncatas, calcaribus ad apicem sitis. 
Corpus utrinque angustatum, maris gracilius. Mandibulae edentatae, antennae ante oculos insertae, lon^ae, 
articulo 4‘" oreviusculo, 5‘<> elongate. 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, securiformi. 
1. A. NiTENS. —Niger, punctatus, pube longa tenui albida vestitus, capite parvo, canaliculate, tuberculo 
lateral! apice obtuso, elytris testaceis, glabris, disco saepius infuscato, apice oblique truncatis. 
Long. •63. 
Lee. Agass. Exp. 
Found at the mouth of Pic River, Lake Superior. If Kirby had not compared his 
Pachyta liturata with the European P. ‘i-maculata, (which belongs to the third 
group of this family,) I should have referred my specimens to his species. 
§2. Palpi labiales articulo ultimo longiusculo, triangular!. 
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, inequaliter pubescentibus, apice recte truncatis. Long. ‘60. 
Lee. Ag. Exp. 
Pachyta aitenuata, Hald. 1. c. 
81 
