OF AMERICA NORTH OF MEXICO. 107 



TRAGOSOMA. Serv. 



Mesosternum simplex. 



Antennas corpora dimidio breviores 11-articulatae, filiformes, articulo 3'° longiore. 



Palpi breves, vix dilatati. 



Thorax transversus, hexagonus, lateribus uni-spinosus. 



Tibiee filiformes baud compressse. 



Seems to approach the Callidia in form. The great length of the elytra, as 



compared with the thorax, is very remarkable. 



1. T. Harrisii. — Rufo-piceum thorace pectoreque flavo-pubescentibus j thorace latitudine fere triple breviore, 

 confertissime punctato subcanaliculato, impressionibus marginalibus circumcincto, ante basin utrinque 

 subimpresso; elytris thorace paulo latioribus sat dense punctatis, obsolete multicostatis. Long. 1-15. 



Newfoundland ; Connecticut. Dr. Harris, to whom the species is dedicated, has 

 found it in New Hampshire. It is very closely allied^to the European T. depsarium. 



PRIONUS Geo/. 



Mesosternum simplex. 



Antennae multi-articulatse, articulo 3'° longiore, maris imbricatte, fcminas saspius serratse. 



Palpi elongati, paulo dilatati. 



Thorax transversus, lateribus saepius trispinosus ; in alteris unispinosus. 



Tibiae, compress^ anticae angulo externo producto. 



The antennae are very variable in this genus, yet the close resemblance of the 

 species forbids the establishment of genera on these variations. Our species may 

 be divided into three groups : 



A. Anteniije 13 — 14 articulatse; thorax lateribus unispinosus. Sp. 1 — 2. 



B. AntennsB 18 — 20 articulatse; thorax lateribus tridentatus. Sp. 3 — 4. 



C. Antennae 12articulat2e; thorax lateribus tridentatus. Sp. 5. 



A. Antennae 13 — 14 articulatae, thorax lateribus unispinosus. 



1. P. EMAEQiNATUS. — Piceus, nitidus, thorace punctatissimo, flavo-piloso, antrorsum angustato, lateribus 



ante medium unispinoso, angulis posticis rectis : elytris parcius grosse punctatis; antennis 14-articulatis. 



Long. 'lb. 

 Say. J. Ac. Nat. So. 3, 327. 



Mas. — Antennis crassis valde imbricatis, articulis subtus 3 — 13 ad apicem valde emarginatis. Femina 

 latet. 



Two specimens near Long's Peak. 



2. P. INTEGER. — Piceus, nitidus, thorace subtiliter punctulato, antrorsum angustato, lateribus ad medium 



unidentato, angulis posticis fere obtusis; elytris parce rugose-punctatis, antennis 1 3-articulatis. Long. -OS. 

 Mas. — Antennis crassis valde imbricatis, articulo ultimo complicate, sicut a duobus connatis formato ; 

 3 — 12 subtus ad apicem vix sinuatis. Femina latet. 



One specimen, near Pike's Peak, Rocky Mountains. 



