56 DESCRIPTIONS OF NEW SPECIES. 



rotundatis ante medium postice depressis, elytris confertim subtiliter 

 punctatis, limbo apicali pallidiore, antenuis pedibusque runs, abdomiiie 

 parce punctulato. Long. *15. 



One specimen, north shore of Lake Superior. The disc of the 

 thorax is broadly and uniformly convex in front, but a little before 

 the middle is a lateral impression which flattens the margin from 

 that point almost to the base : at the middle just in front of the 

 base is a very vague scarcely discernible curved impression. 



( 2®-&:. A. patruelis. Elongata, picea, fortiter punctata, thorace lati- 

 tudine baud breviore, antice paulo angustato, lateribus modice rotundatis 

 fortiter marginatis subtiliter subrepandis, elytris planiusculis late 

 marginatis, abdomine subtiliter rugose punctulato, antenuis pedibusque 

 piceis. Long. -12 — -15. 



North side of Lake Superior. The first joint of the hind tarsi 

 is not conspicuously longer than the others, and I am by no means 

 convinced that this species is properly referred to the present 

 genus. The lateral margin of the thorax is very finely undulated, 

 giving a slightly repand appearance. 



AMPIOCimOUM Kkaatz. 



205. A. floril>un(luni. (Mas) nigro-piceum nitidum, capite thora- 

 ceque parce subtiliter punctatis, boc latitudine paulo breviore, lateribus 

 rotundatis, margine fortiter depresso testaceo postice paulo latiore, ante 

 basin transversim impresso et parce punctato, elytris subtilius modice 

 punctatis, umbra bumerali testacea ornatis, abdomine laevi, antenuis 

 pedibusque piceis, ill is basi testaceis. Long. *20. 



Femina, antennis, pedibus, thorace elytrisque testaceis his sutura infus- 

 cata. 



San Francisco, California ; on Spiraea, abundant. Resembles 

 in form A. testaceum, but the head and thorax are shining and 

 distinctly punctulate, and the thorax is more convex. 



TRIfiOAODEMlS Lec. 



Mandibulse breves muticae ; palpi maxillares articulo ultimo praecedente 

 fere duplo longiore ; antennae articulis 2 — 4 tenuibus, 3io longiore, 5 — 11 

 abrupte majoribus rotundatis ; tibiae parce spinulosae, anticae infra medium 

 intus late emarginatis ; tarsi postici tibiis duplo breviores, articulo lmo 

 sequentes duos aequante. 



This genus is founded on a very rare insect of the Southern 

 States, which resembles in form the anomalous European genus 



