i8o Memoirs on the Coleoptera 



visible near basal third; surface with numerous fine creases, coarser and 

 more conspicuous basally; elytra fully four-fifths longer than wide, not 

 quite twice as wide as the prothorax, symmetric, the sides broadly, 

 evenly arcuate and but little more so basally; apex gradually sharply 

 ogival; striae rather coarse and deeply impressed, strongly punctured, 

 becoming more or less confused and broken in nearly outer half, the 

 margins very narrowly reflexed, not at all metallic; anterior male tarsi 

 slender, the apical third of the first and the second and third joints 

 densely spongiose beneath. Length (d^) 17.5 mm.; width 7.3 mm. 

 California (Piedmont, Alameda Co.), — Nunenmacher. 



This species may be placed near compositus Csy., but is much 

 more elongate and with more narrowed thoracic base, this being 

 narrower in procerus and wider in compositus than half the maximum 

 width, but in both the prothorax js relatively larger than in inter- 

 ruptus; it also comes near constrictus Lee. (dissolutus Csy. nee 

 Schm.), which also has that part relatively rather large in size and 

 the thoracic base even more narrowed than in procerus, but the 

 hind body is more ventricose and the striae finer and with the 

 intervals more interrupted in constrictus: 



The species described by Prof. Wickham (Pr. Ent. Soc.Wash., 

 21, p. 170), under the name Pseudonomaretus manni* is closely 

 allied in most respects to Brennus symmetricus Csy., being merely a 

 little narrower, with the finer elytral striae relatively more separated 

 internally and closer externally. It belongs to the great Pacific 

 coastal genus Brennus, although the anterior male tarsi differ in 

 being more broadly dilated. It is singular that this marked dis- 

 crepancy in structure of the anterior male tarsi was not more fully 

 dwelt upon by the author, as it constitutes the most remarkable 

 structural peculiarity of the species. 



The following is one of the more distinctly defined of the mar- 

 ginatus section: 



Brennus columbianus n. sp. — Male elongate-suboval, convex, rather 

 shining, the elytra polished, the head black, the pronotum black, with 

 faint violaceous lustre, the elytra bright greenish-aeneous, becoming 

 more cupreous basally, the moderately reflexed side margins bright blue 



* As part of a scheme to promote uniformity in nomenclature, it has become an 

 unwritten law to attach a single i to all names of persons, in forming the specific name. 

 Under a uniform rule of this kind some ambiguity can be avoided. For instance, if 

 the specific designation were founded upon the family name Jacobi, the specific name 

 jacohii, under such a rule, would indicate this, but, if the rule be not observed con- 

 sistently, it would be impossible to determine whether the name of the person honored 

 might not be Jacob — Latinized to Jacobius. 



