224 



LAKE SUPERIOR. 



MYCETOPHAGUS Fdbr. 



pictus. 

 TRIPHYLLUS Latr. 



didesmus [261. 



Mycetophagus did. Say. J. Ac. 5, 

 DERMKSTES Lin. 



murinusii'n. Er. Ins. Germ. 3, 429. 

 BYRRHUS Linne. 



88 americanus. 



cyclophorus Kb. N. Z. 117. 



picipes Kb. N. Z. 116. 



varius Fabr. El. 1, 105. 



87 eximius. 



88 tesselatus. 

 SYNCALYPTA Dillwyn. 



89 echinata. 

 PLATYSOMA Leach. 



depressum Er. Jalir. 111. 

 HISTER Lin. 



abbreviatus Fabr. El. 1, 89. 

 depurator Say. J. Ac. 5, 33. 



americanus Payk. 31. 

 subrotundus Say. J. Ac. 5,39. 

 PAROMALUS Er. 



bistriatus Er. Jalir. 

 SAPRINUS Leach. 



pensylvanicus Er. 184. 



assimilis Er. 184. 



distinguendus. 



proximus. 



mancus. 



Ulster m. Say. J. Ac. 15, 41. 

 fraternus Lee. B. J. 5, 77. 



Ulster f. Say. J. Ac. 5, 40. 

 PLATYCERUS Latr. 

 80 depressus. 

 quercus ScJion. 



PI. securidens Say.J. Ac. 3, 249. 



Lucanus querc. Weber Obs. 1, 85. 

 GEOTRUPES Latr. 

 miarophagus Say. J. Ac. 3, 211. 



86 B. americanus. Oblongo-ovatus, antice acutus, convexus, niger dense breviter 

 fusco-pubescens, thorace nigro cinereoque variegata, elytris sutura vittisque 4 nigris, 

 guttis albis interrupts, quse spatium transversum antice dentatum, postice lateribus 

 obliquis, medio recte truncatum, formant ; guttisque nonnullis aliis versus apicem ob- 

 lique retrorsum positis ; tenuiter striatis. Long. -4. Twice the size of B. cyclophorus ; 

 found from Niagara to Lake Superior. 



8? B. eximius. Oblongus antice acutus, lateribus parallelus, niger fusco-pubescens, 

 nigro flavoque variegatus ; thorace nigro, cinereo flavoque variegato, elytris striatis, 

 sutura vittisque 4 nigris, his guttis interruptis, lineam ante medium transversam den- 

 tatam, figuram semicircularem antice deutatam, lineamque versus marginem antror- 

 sum obliquam formantibus, his omnibus postice flavo tomentosis. Long. -2. Pic. 

 The middle part of the anterior margin of the semicircular figure forms a broad com- 

 mon cinereous spot. 



88 B. tesselatus. Elongatulus, utrinque subacutus, virescente-niger nigro-pubescens, 

 elytris striatis cinereo tesselatis, subtus niger, pedibus piceis. Long. -12. Pic. 



89 S. echinata. Breviter ovata, utrinque attenuata, nigra parce cinereo-pubescens, 

 setis erectis clavatis nigris adspersa, in elytra longioribus uniseriatim in striarum in- 

 terstitiis positis ; striis tenuibus, marginali sola profunda. Long. lin. Eagle Har- 

 bor. 



90 P. depressus. Depressus, niger vix seneus, thorace lateribus pone medium angula- 

 to, angulis posticis obtusis minime rotundatis, elytris profundius punctatis, striatisque. 

 Long. -62. Twice the size of P. quercus, the elytral stria are alternately a little ap- 

 proximated ; the mandibles of the $ are much dilated at the apex, but less curved than 

 in P. quercus. A very small specimen has the sides of the thorax behind the angle 

 emarginate, so that the basal angles become still more prominent and scarcely obtuse. 



