390 CALIFORNIA ACADEMY OF SCIENCES. 



This insect looks far more like an Oligomerus than 

 Tripopitys, but the serrate antenna?, the depressed meso- 

 sternum and the excavate nietasternuni have induced me 

 to place it in the latter genus. The onh* characters in 

 Avhich it differs from that genus are the elvtral sculpture 

 ami the more explanate sides of the thorax, in the latter 

 respect resembling Ernobius. The specimen before me 

 is a female, and the antenna? are equally serrate from the 

 third to the tenth joints, eleventh longer. The elytral 

 sculpture and ornamentation make it an easilv recognized 

 species. 



Occurs in Oregon. 



HEMirTYCHUS JCSTRI ATI'S U. Sp. 



Oblong, oval, piceous black, feeblv shining, surface 

 tinelv clothed with short indistinct pubescence. Head 

 and thorax not visibly punctate. Elytra not \-isibly punc- 

 tate except under microscopic power, the lateral stria^ en- 

 tirely obliterated. Bodv beneath not visiblv punctate. 

 Abdomen sparselv punctate, opaque, tineh' pubescent. 

 Length. .18 inch; 4.5 mm. 



This species is remarkable in its large size and almost 

 entire obliteration of sculpture. 



San Fernando. 



An examination at this time demonstrates that as the 

 genera are now recognized several species formerlv 

 placed by Dr. LeConte in Catorama must come to Hem- 

 iptychus. These are scc/ans, ob^olctu and pimctulaia. 

 These will form a group bv themselves, while ohsohtus 

 with faint stria^ is the link with the striate group. The 

 species are closelv related among themselves, but the fol- 

 lowdng brief table will enable them to be separated: 



Elj'tra very obviously punctate oveu with moderate power; color piceous 



black. sectans. 



Elytra scarcely ininctnlate; color browu. 



