78 [May, 



thorace confertim subtilius punctato, linea dorsali obsoleta laevi, elongato, ab 

 apice angustato, lateribus parum rotundatis, angulis anticis acutis, non productis, 

 elytris confertim punctato-striatis. Long. 11. 



Georgia. This species has the elongate form and brown color of those of the 

 preceding division, but is easily distinguished by the absence of the little tooth 

 behind the eye. The posterior angles of the thorax are obtuse. 



7. S. n iti d u lus, linearis, valde depressus, testaceus, nitidus subpubescens, 

 thorace parcius subtiliter punctulato, latitudine longiore, pone medium angus- 

 tato, angulis anticis acutis, haud productis, elytris subtilius seriatim punctatis. 

 Long. '08. 



Colorado River, California, under poplar bark. The sides of the thorax are 

 almost parallel anteriorly, and subangulated at the middle ; the anterior angles 

 are scarcely prominent, and the posterior ones are obtuse. The disc is marked 

 with two faint longitudinal impressions connected at the base. The elytra are 

 not wider than the head, and the rows of punctures become obsolete towards 

 the tip. The head is as broad as the thorax, flattened and finely but not densely 

 punctulate. 



8. S. o p a c u 1 u s, linearis, depressus, rufo-testaceus, opacus, pubescens, tho- 

 race latitudine non longiore, quadrato, angulis omnibus prominulis, lateribus 

 crenulatis fere rectis, confertissime punctato, dorso obsolete bisulcato, elytris 

 subtiliter dense punctato-striatis. Long. *07. 



Colorado River, California, under bark. From the next species it differs by 

 its more elongate and depressed body, and the coarser punctuation of the head 

 and thorax. 



9. S. rectus, elongatus, subdepressus, testaceus, opacus, subpubescens, 

 thorace latitudine subbreviore, quadrato, angulis omnibus rectis, lateribus rectis 

 subcrenatis, confertim punctulato, elytris punctato-striatis. Long. *07. 



One specimen from Illinois, Mr. Willcox. The punctures of the head and 

 thorax are very fine ; the strias of the elytra are more distant than in any of the 

 preceding species. The specimen is not in very good condition, but I think that 

 there can be no doubt of the propriety of referring it to this genus. 



10. S. quad rico His, linearis, subdepressus, rufo-testaceus, nitidulus, sub- 

 pubescens, thorace sat dense punctulato, linea dorsali sublaevi, latitudine sublon- 

 giore, lateribus parallelis subsinuatis, angulis anticis rectis, posticis subobtusis, 

 basi rotundata, elytris thorace non latioribus punctulatis, punctisque vix maiori 

 bus seriatis impressis. Long. -ll. 



Guerin, Icon. Regne An. 198. 



Georgia. My specimens are not in good condition, but present all the cha- 

 racters of this genus, except that in the only antenna now remaining the 10th 

 and llth joints appear closely united. 



11. S. advena, elongatus, rufo-testaceus, subnitidus pubescens, thorace 

 punctulato, transversim quadrato, lateribus paulo rotundatis, angulis anticis dila- 

 tatis, posticis rectis, basi sinuata, elytris subtiliter punctato-striatis ; antennarum 

 articulo 9no sequente minore. Long. -06 '07. 



Erichson, Ins. Deutsch. 339. Redtenbacher, Kafer Oesterr, 778. 



Crtjptophagus advena Waltl, Silberm. Rev. Ent. 2, 256. 

 ' Latridius mil s ceo rum Ziegler, Proc. Acad. Nat. Sc. 2, 270. 



Abundant throughout the United States, in articles of commerce, herbaria, 

 &c. This species, although placed by several entomologists in the present genus, 

 has so much the form of Paramecosoma, that any person would be tempted to 

 refer it to that genus. The first joint of the abdomen is not longer than the 

 second, and therefore, according to Erichson's definition, it would be excluded 

 from the family of Cryptophagides. 



In this essay must be included the description of a remarkable insect, of which 

 my unique specimen is in such a bad condition, that I am unable to determine 

 whether it should be referred to any described genus, or even to indicate its po- 

 sition in the group ; from its specific characters, I suspect a relation with Pedi- 



