14 MEMOIRS ON THE COLEOPTERA 



abdominal segment, are rather better developed than elsewhere. 

 The copulatory spicule in the few instances where it is observable 

 without dissection, has a form in this group very different from 

 that seen in the preceding groups, the apex being less slender and 

 but very feebly curved downward. 



Group VII (Icevis}. 



No other group comprises within its limits such marked diversity 

 of elytral sculpture as this, for while the prothorax remains constant 

 throughout in its very smooth opaque surface, with scarcely a trace 

 of sculpture except the feeble rugulosity about its periphery, the 

 elytra may be more coarsely and conspicuously punctured than in 

 any other species of the genus as in compositus, or perfectly smooth, 

 with barely a trace of any sort of punctuation as in Icevis, this 

 latter condition also being a unique exception in the genus. The 

 body is rather short and notably stout in form and is unusually 

 ventricose. The copulatory spicule is somewhat as in the cali- 

 fornicus group, being subangularly bent apically, the distal part 

 straight, but it is more prolonged than in californicus. There 

 seem to be three species and several subspecies as follows: 



Elytral punctures strong, each with an acute anterior granule. Body 

 ( 9 ) stout, convex, dull and sericeo-alutaceous in lustre; head smaller 

 than the prothorax, moderately rugulose almost throughout, the 

 front not punctate; impressions' feeble; labrum strongly lobed; 

 prothorax large, much wider than long, widest near the apex, the 

 sides only moderately oblique and feebly arcuate, inwardly arcuate 

 at base, the reflexed margin moderate, stronger posteriorly, not 

 attaining the base; surface opaque, finely but distinctly, confusedly 

 rugulose basally and apically and feebly, transversely plicatulate 

 laterally; elytra less than one-half longer than wide, evenly oval, 

 pointed apically, widest at the middle, much wider than the pro- 

 thorax, the punctures rather coarse, moderately deep, impressed and 

 in mutual contact throughout, the intervals opaculate; foveae 

 indistinct. Male much narrower than the female, with more oblong 

 elytra, the punctures nearly similar but distinctly separated sutur- 

 ally, the interspaces similarly opaculate; prothorax as in seqiioiantin, 

 much narrower and more narrowed basally than in the female, the 

 side margin attaining the base in the single example at hand. Length 

 (d* 9 ) 15-5 mm.; width 5.8-6.3 mm. California (Wawona, Mariposa 

 Co.). [0. collar-is Csy.]. Description drawn from the type of 



collaris horni Lee. 



A Male only moderately stout, convex, dull throughout; head similar 

 but less rugulose, the front very smooth, punctureless; supra- 



