48 DESCRIPTIONS OF NEW SPECIES. 



invisible last joint of maxillary palpi, and the joints of the hind 

 tarsi gradually diminishing in length ; the neck is moderately 

 thick, as in Lathrobium. It would seem more nearly related to 

 Scimbalium than to any other foreign genus, but the convex body 

 at once distinguishes it. 



SU1VIUS Steph. 



166. S. monstrosus. Capite thoraceque nigris, parce pubescentibus, 

 coufertim punctatis, illo antice utrinque irnpresso, hoc latitudine paulo 

 longiore, postice rotundato, antice angustato et producto, lateribus hide 

 antice sinuatis, disco postice utrinque curvatim irnpresso, linea dorsali 

 laevi parum conspicua, elytris testaceis planiusculis fortiter punctatis. 

 abdomine punctulato piceo, segiuentis anticis testaceo-marginatis, ulti- 

 ruis duobus testaceis, ore antennis pedibusque testaceis. Long. *18. 



Louisiana ; Dr. Schaum. Resembles in form a Stilicus. 



PAEDERIS Gkav. 



167. P. compote IIS. Rufus nitidus, capite rnetasterno segmentisque 

 abdominis duobus ultimis nigris, elytris cyaneis, confertim punctatis ; 

 antennis nigro-piceis, articulis 3 primis runs, pedibus obscure ruiis. 

 Long. -28. 



Sacramento Valley, California; Mr. S. S. Rath von. Resem- 

 bles P. littorarius, but is larger, and the elytra are much less 

 coarsely punctured. 



PI^OPHILUS Gkav. 



168. P. parens. Niger subopacus, capite thoraceque dense punctu- 

 latis, illo antice parce grosse punctato, hoc punctis magnis baud pro- 

 fundis sparsim positis, elytris dense profunde punctatis, abdomine sub- 

 tiliter profunde punctato, antennis palpis pedibusque rlavis. Long. - 48 

 —•52. 



Southern States; not rare. Smaller and more slender than P. 

 latipes, with the head and thorax more densely punctulate. 



16©. P. densus. Niger subopacus, capite parce grosse punctato, punc- 

 tulis minutis parcis interspersis, thorace elytrisque profunde fortiter 

 punctatis, illo linea dorsali laevi parum conspicua, abdomine subtilius 

 punctato, antennis palpis pedibusque flavo-testaceis. Long. *37. 



Colorado and Gila valleys, California. Of the same form as 

 P. latipes, but much smaller. 



