28 MEMOIRS ON THE COLEOPTERA 



identify ventricosus (sinuatus Csy.), interruptus and dissolutus 

 properly, but from what I can glean from the Roeschke mono- 

 graph, my identification of ventricosus was the large form called 

 by him lativentris Mots. ; it was in no sense the fuchsianus of Rivers, 

 as stated by the author. My identification of striatopunctatus Chd., 

 was the form which the author calls alternatus Mots. My deter- 

 mination of ovalis Mots, is correct, as it agrees thoroughly with the 

 description and particularly with the careful figure given by Mot- 

 schulsky. Gentilis Csy., is a valid subspecies at least; it has smaller 

 punctures than crenatus Mots., and is stouter in form in both 

 sexes. Opacicollis, convergens and sculptipennis are distinct among 

 themselves and are not all varieties of obliqims. Basalis is a valid 

 species and duplicatus is rather more than a subspecies of cristatus. 

 One source of trouble is that Dr. Roeschke does not know my work 

 very thoroughly, because of frequent failure to grasp my meaning, 

 probably largely because of unfamiliarity with the English language; 

 the consequence is that he has failed to identify my species cor- 

 rectly. Another origin of discord is the fact that we evidently 

 have radically different ideas as to the meaning of the word species; 

 this is a matter of opinion, the correctness of which need not greatly 

 concern us, as it will be definitely adjudicated under the light of 

 future knowledge ; the question now is more essentially one regarding 

 absolute synonymy, but in the Roeschkean sense, a synonym need 

 not necessarily be a synonym. 



The following are some additional forms in this genus: 



Brennus rugiceps ssp. congener nov. Body moderately ventricose 

 and convex, deep black, shining, the pronotum opaculate; head in almost 

 every way as in incipiens, the irregular crest having an elongate crater- 

 like posterior excavation, partially closed posteriorly by a short longi- 

 tudinal ridge; prothorax differing decidedly, smoother and more opaque, 

 slightly elongate, the sides subangularly widest before the middle, 

 thence oblique and straight to the subbasal sinus, thence subparallel and 

 straight for a considerable distance to the basal margin, which is trans- 

 verse to feebly sinuato-truncate and half the maximum width (9), 

 much less (cT); elytra less than one-half longer than wide, oval, rather 

 transversely rounded at base, deeply but very irregularly i8-striate, 

 the striae moderately broken but easily traceable throughout at the 

 sides, rather finely and indistinctly punctate, the intervals moderately 

 convex, strongly so laterally; margins finely re flexed, not metallic; 

 anterior tarsi (cf) with the first joint in apical third, the second and third 

 wholly spongy-pubescent beneath, the fourth without trace of squamules. 

 Length (o 71 9 ) 12.5-14.5 mm.; width 5.8-6.7 mm. Oregon (Josephine 

 Co.), Nunenmacher. A single pair. 



