56 DESCRIPTIONS OF NEW SPECIES. 



rotundatis ante medium postice depressis, elytris confertim subtiliter 

 punctatis, limbo apicali pallidiore, anteunis pedibusque rufis, abdomiue 

 parce punotulato. 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. 



2O t. A. patriielis. Elongata, picea, fortiter punctata, thorace lati- 

 tudine baud breviore, antice paulo angustato, lateribus modice rotundatis 

 fortiter inarginatis subtiliter subrepandis, elytris planiusculis late 

 marginatis, abdomine subtiliter rugose punctulato, antennis 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. 



AMPHICHROUM: KRAATZ. 



24)5. A. floribundum. (Mas) nigro-piceum nitidum, capite tliora- 

 ceque parce subtiliter punctatis, hoc latitudine paulo breviore, lateribus 

 rotundatis, margine fortiter depresso testaceo postice paulo latiore, ante 

 basin transversim impresso et parce punctate, elytris subtilius modice 

 punctatis, umbra humerali testacea ornatis, abdomine la?vi, antenuis 

 pedibusque piceis, illis basi testaceis. Long. '20. 



Femina, anteiinis, 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. 



TRIGONODEMUS LEC. 



Mandibulse breves muticse ; palpi maxillares articulo ultimo precedents 

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

 abrupte rnajoribus rotundatis ; tibiae parce spinulosse, anticse infra medium 

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

 sequentes duos aequante. 



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

 States, which resembles in form the anomalous European genus 



