North American Histeroides. 85 



Thorax postice linea punctorum majorum impressus. Elytra 

 stria basali obliqua obsoletissima, abbreviata : lateralibus pro- 

 fundis. Frosternum breve, leviter bistriatum, mesosternum an- 

 tice arcuatum, cum poststerni parte antica medio depressum. 

 Podex levissime puncticulatus. 



Prsecedentem valde refert, sed thorax postice non margina- 

 tus, et podex fere Isevis. 



Species obscurce, aut nobis incognita. 



1. Hister memnonius, Melsh., Say, Journ. Acad. Nat. Sc. 

 Philadelphia, Vol. V. p. 32. 



" Inner thoracic stria abbreviated a little behind the middle, 

 elytra each with a basal puncture. Elytra with the marginal 

 and four dorsal striae entire, the fourth hardly reaching the 

 base, fifth less than half the length of the elytron. Anterior 

 tibiae 4-dentate." 



Haec species thoracis stria interiore abbreviata insignis. 

 Erichsonio eadem ac merdarius habebatur ; nobis tamen, H. 

 obtusato confinior videtur ; striatione tamen thoracica ambabus 

 abhorret. (Vide Obs. post H. depuratoris descriptionem.) 



2. Hister thoracicus, PaykuU, Monographia, Hist. p. 20. 

 Tab. II. Fig. 6. 



" Niger, parum niiidus. Frons stria Integra. Thorax bis- 

 triatus, stria externa in medio abbreviata, interna integra, 

 margine oculo armato subtilissime, confertissime punctulato. 

 Elytra oculis nudis laevia, armatis, striola marginal! in medio 

 abbreviata, tribusque primis dorsalibus subintegris, introrsum 

 arcuatis, omnibus obsoletis, laevissimis. Abdomen puncticula- 

 tum ; tibiis anticis 4-dentatis." 



3. Ulster incisus, Knoch-Erichson, King's Jahrbiicher der 

 Insectenkunde, Erster Band, p. 134. 



Orbicularis, ater, opacus. Frons stria profunda, medio sub- 

 obliterata.. Thorax lateribus ciliatis, bistriatus, striis antice 

 paulo abbrevialis, sulcis parvis prope marginem anteriorem, 

 subprofundis. Elytra stria suturali et marginali nullis, qua- 

 tuor primis dorsalibus integris, quinta post medium antice 



