30 MEMOIRS ON THE COLEOPTERA 



This species is about the smallest of the interrupt us series and 

 may be placed near corpulentus, which however has about fifteen 

 striae, irregular laterally and without trace of metallic margin. 



Brennus oreophilus ssp. humeralis nov. Smoother and more ven- 

 tricose than oreophilus, shining, the pronotum similarly smooth and 

 opaculate; head nearly similar; prothorax relatively somewhat smaller 

 and narrower, fully as long as wide and apparently a little longer, the 

 anterior angles more rounded, the sides posteriorly similarly oblique and 

 feebly sinuate; base slightly sinuate and one-half the maximum width; 

 surface and margins nearly as in oreophilus; elytra differing decidedly, 

 more inflated, barely a third longer than wide, the sides rapidly rounding 

 inward at base to the thoracic base, the humeri thus more evident than 

 in any other form of the genus, the apex acutely ogival; surface very 

 convex, rather finely striate, the striae finely, not closely punctate, very 

 much finer and more finely punctate than in oreophilus, confused in nearly 

 lateral third; male with the anterior tarsi distinctly dilated; joints two 

 and three and apical half of the first densely spongy-pubescent, the fourth 

 without squamules. Length (cT ) 15.0 mm.; width 7.0 mm. California 

 (Mokelumne Hill, Calaveras Co.), Blaisdell. 



In the male of oreophilus the anterior tarsi are rather less dilated 

 but similarly clothed beneath, except that the first joint is densely 

 clothed in rather less than apical half; the elytra are more evenly 

 rounded at the sides basally and the elytral striae, and especially 

 the punctures, are much coarser. From hoppingi Roe., in which 

 also the humeri are somewhat more evident than in oreophilus, 

 humeralis may be known at once by the much shorter, more finely 

 punctate and more shining elytra, more distinct humeri and less 

 sinuate oblique sides of the prothorax. 



The Sierra form placed with lativentris Mots., by Dr. Roeschke 

 is not exactly the same, the general habitus is very similar but the 

 prothorax is somewhat shorter and broader. 



Maronetus n. gen. 



In describing Pseudonomaretus, Dr. Roeschke failed to indicate 

 any type species and, as he included two distinct genera under that 

 name, I will here designate the large and conspicuous and more 

 completely striate species relictus Horn as the type; regularis Lee., 

 merkeli Horn and idahoensis Webb, will also form part of Pseudo- 

 nomaretus and perhaps one or two other similar forms. Under the 

 name Maronetus, I have separated the smaller and more slender 

 species, with less complete elytral striation, of which the following 

 may be regarded as the type. 



