DESCRIPTIONS OF NEW SPECIES. 193 



tively more equal. The sexual characters are as in the two 

 allied genera. 



510. M. Ed wards ii. Fusco-testaceum, opaeum parce pubeseens, 

 antennis pedibus prothoraceque pilis volatilibus parcius villoso, hoc 

 latitudine longiore, tuberculo laterali majore obtuso, antice posticeque 

 late constricto et lateribus sinuato; elytris alutaceo-granulatis, versus 

 suturaia parce punctato-striatis, punctis pone medium obsoletis, litura 

 angulata pallidiore mox ante medium siguatis. Loug. 12 mm. 



One 9 ; Santa Rosa Island, California, Mr. II. Edwards, to 

 whom I take pleasure in dedicating this remarkable addition to 

 our fauna. 



MOLORCHUS Fabr. 



511. M. longicollis. Niger, antennis pedibus prothoraceque pilis 

 volatilibus munitis, hoc latitudine sesqui longiore, apice basique con- 

 stricto, pone medium paulo latiore, et lateribus angulato, dorso plani- 

 usculo minus dense punctato ; elytris punctatis, testaceis, planis, oblique 

 impressis et ad apicetn paulo tumidis; pedibus antennarumque basi 

 piceo-ferrugineis. Long. 8 mm. 



One %, California, Mr. Ulke. Differs from M. bimacalatus 

 chiefly by the prothorax being narrower, less rounded, some- 

 what angulated at the sides, and less densely punctured. The 

 antennas are longer than the body, slender, piceous, with the first 

 joint brownish-red. 



RHOPALOPHORUS Sekv. 



512. R. laevicollis. Niger, opacus, prothorace impunctato, cinereo 

 pubesceute, vitta dorsali glabro, apice basi subtusque plus minusve 

 rubro ; elytris fortiter punctatis, cinereo-pubescentibus ; antenuarum 

 articulo 4to sequentis dimidium sequante. Long. 12 mm. 



Texas and northern Mexico. Larger than the other species in 

 our fauna, and easily known by the impunctured prothorax, which 

 is distinctly constricted on the sides at the base, though the con- 

 striction does not extend upon the disk. 



HOLOPLEIRA Lec. 

 Body elongate, rather depressed, densely punctured, pruinose 

 with extremely short white hairs, head short, front small, vertical, 

 mouth small; palpi short, stout, genae moderately long; eyes 

 rather small, somewhal finely granulated, very deeply emarginate, 

 upper lobe very narrow; antennas widely separated, placed on 



