14 MEMOIRS ON THE COLEOPTERA 



rugose, with the transverse subapical line deep and conspicuous; elytra 

 oblong-oval, rather flat above, evenly ogival in nearly apical half, the 

 sides thence very feebly converging to the rapid and strong humeral 

 arcuation; punctures rather small, only feebly impressed, well separated, a 

 little coarser and subconfluent laterally; hind tarsi longer than the tibiae. 

 Length ( 9 ) 17-5 mm. ; width 6.3 mm. California (St. Helena, Napa Co.) 



There can be no doubt that this must figure as a distinct subspecies 

 of sculptilis, a female of which from Folker's Ranch, Sonoma Co., 

 was also included in the Fuchs collection. The antennae in the 

 type of opacipennis are longer than in the female of sculptilis, 

 among other differences. 



Group IV (intermedius} 



This group in my previous revision of Omus was designated 

 parvicolUs, but I find so many evidences, more or less positive, that 

 the intermedius of Leng is a form allied to the one described by me 

 under the name parvicolUs, that the propriety of using intermedius 

 as the group name becomes rather obvious. The parvicolUs section 

 of the intermedius group differs from the essentially more northern 

 blaisdelli section, in the narrower bodily outline and relatively 

 smaller anterior parts, as well as in the much finer and sparser 

 elytral punctures. Not being sure that any one of the forms now 

 constituting the parvicolUs or blaisdelli sections is really identical 

 with intermedius, I have maintained them all as distinct from the 

 latter, especially as Mr. Leng himself was unable to identify it in 

 my collection. The type may possibly be lost. 



Omus parvicollis ssp. ovipennis nov. Smaller and more abbreviated 

 than parvicolUs and with sparser elytral punctures. Male elongate, 

 convex, rather smooth, alutaceous; head slightly narrower than the 

 prothorax, strongly rugose, finely so on the front, which is not in the 

 least punctate medially; labrum with a very broad and evenly rounded 

 median lobe, which does not project evidently beyond the small lateral 

 lobes; antennae long, moderately slender; prothorax barely visibly wider 

 than long, the sides subparallel anteriorly, thence arcuate gradually and 

 converging posteriorly, the fine side margins rather strongly, subequally 

 reflexed throughout, uniting with the basal bead; surface broadly convex, 

 opaque, finely creased, more deeply so laterally, the transverse impressions 

 moderate and equal, the median stria distinct; elytra very nearly twice 

 as long as wide, widest at the middle, evenly oval and without humeri; 

 surface convex, finely and sparsely punctate, a little less sparsely toward 

 the sides; anterior tarsi with the basal joint somewhat longer than wide, 

 much longer than the second, which is a third wider than long. Length 



