of the Southern portions of South America. 53 



29. Adio7-istus punctulatus,Wa,terh.f I. c. 

 Hab. Same as last. 



30. Adioristus angustatus, Waterh., /. c. 

 Hab. Same as last. 



31. Adioristus conspersuSyWdXevh., I. c. 

 Hab. Same as last. 



32. Adioristus simplex, Waterh.^ /. c. 

 Hab. Same as last. 



Obs. Mr, Bridges found the above six species of Listroderes and 

 Adioristus all in one spot^ both under stones and under dung. 



33. Rhyephenes Incas, Schonli. 



Hab. Valparaiso. On trunks of trees. 



The new species of Gyriosomus noticed in this paper were de- 

 scribed in the ' Annals and Mag. of Nat. Hist.' for October 1843, 

 vol. X. p. 258. 



Besides these, Mr. Bridges' collection contains a new species of 

 each of the following genera, viz. Gonogenius, Psammetichus and 

 Naupadus, which I will proceed to describe. I may here observe, 

 as regards two genera noticed in the foregoing pages, Lophotus 

 and Rhyephenes, that the genus Eublepharus of MM. Gay and 

 Solier* is synonymous with the former, and the genus Physotho- 

 rus of the same authors is sjTionymous with the latter. The Eu- 

 blepharus Rouleti, Gay et Sol., is undoubtedly the same as the 

 Lophotus nodipemns, Hope, previously descrilaed and figured in 

 the first volume of the '■ Transactions of the Eut. Soc. of London.' 

 The Eub. Germari (G. et Sol.) is, I suspect, the Artijms superci- 

 liosus, Guer., Voy. de la Coqu. 



Genus Gyriosomus. In addition to the characters already 

 pointed out, I may notice that G. Luczotii, G. Bridgesii and G. 

 elongatus have the prsesternum contracted and produced back- 

 wards beyond the insertion of the femora, whilst in Gyriosomus 

 Hopei and G. marmoratus the prsesternum is broader and not pro- 

 duced backwards. 



Gonogenius brevipes. 

 Gon. niger sub-obscurus; corpore plerumque pulveie fusco obsito : 

 capite rugose punctato : thorace lateribus aqualiter rotundato, an- 

 tice posticeque suberaarginato, angulis acutis; supra paulo convexo, 

 punctis distinctis, irregulariter adspersis, impresso : elytris ova- 

 libus, leviter convexis, punctato-striatis ; interstitiis striarum, cos- 

 tatis, distincte punctatis vel rugosis : pedibus brevibus, crassis. — 

 Long. Corp. 6 — 8 lin. ; lat. 2| — 3| liu. 



This species differs from the Gonogenius vidgaris in being rather 

 shorter, in having the head narrower, the thorax shorter and not 



* See Annales de la Soc. Ent. de France, tome viii. p. 5. 



