16 MEMOIRS ON THE COLEOPTERA 



Group VI (sequoiarum) 



The following is one of the more distinct and isolated forms of the 

 subgenus: 



Omus laticollis n. sp. Body (9 ) elongate, subparallel, rather shining; 

 head distinctly narrower than the prothorax, strongly rugose and shining 

 throughout, without frontal punctures, the labral lobe prominent, broadly 

 rounded; antennae moderate in length, rather thick; prothorax strongly 

 transverse, only slightly narrower than the widest part of the elytra, 

 obtrapezoidal. with subevenly rounded sides from apex to base, the lateral 

 margin attaining the base; surface strongly and evenly vermiculato- 

 rugose throughout; elytra about twice as long as wide, the sides parallel 

 and almost straight, rounding at base, gradually arcuate and converging 

 posteriorly; lateral margin distinctly reflexed basally; punctures rather 

 coarse, deep, evenly close-set and cribrate, each attended by a minute 

 anterior granule; larger sparse fovese distinct; legs slender. Male slightly 

 more ventricose than the female but more slender, with much less trans- 

 verse prothorax and rather feebler anterior rugulosity, the antennae 

 long and slender; elytra twice as long as wide, elongate-oval, with arcuate 

 sides and less obvious humeri, the sculpture nearly similar; anterior 

 tarsi with the first three joints subequal in size, the first narrowed basally 

 as usual. Length (<? ) 15.5 mm., ( 9 ) 17.3 mm.; width (cf ) 5.4 mm., ( 9 ) 

 6.0 mm. California (Tuolumne Co.). 



Sent to me-under the name intermedius Leng, which very erroneous 

 determination I am informed came from Dr. W. Horn of Berlin. It 

 does not agree in any feature with intermedius as defined by Mr. 

 Leng. The latter author, on recently viewing my material, stated 

 that it was impossible for him, after so long an absence of the type, 

 to be sufficiently certain concerning its general characters to identify 

 it. The type is said to have been sent back to the late Mr. Fuchs 

 many years ago, but the description given by Mr. Leng is fairly full 

 and presumably accurate. 



In the Fuchs collection, recently received, I was extremely glad 

 to find the female of Omus sierricola Csy., agreeing perfectly with 

 the male, even in the basally abbreviated lateral reflexed thoracic 

 margin, which thus seems to be a constant character. It is labeled 

 " Big Trees, Calaveras Co." So its Sierran habitat, which I sur- 

 mised from its general habitus, proves to be correct. 



Group VII (horni) 



The sharp granule at the anterior margin of each elytral puncture 

 is a marked feature of this group when compared with the Icevis 



