6 MEMOIRS ON THE COLEOPTERA 



of the latter not so fine and the elytra more evenly elongate-oval 

 and less oblong; they are also more convex and have the punctures 

 more clearly separated and without such evident acute granules, 

 being more as in calif ornicus. Length (cf) 14.0-14.3 mm.; width 

 4.8-5.1 mm. California (the type bears no more accurate indica- 

 tion of locality, but another example at hand was collected near 

 San Francisco) mimus Csy. 



Additional material serves to show that sculptilis should be given 

 higher relative value than previously accorded it, the narrow form 

 of body and peculiar outline of the prothorax, still more accentu- 

 ated in mimus, serving to isolate it from calif ornicus at a glance; 

 mimus is evidently closely related but is much more slender in its 

 anterior parts. The types of vermiculatus were received under the 

 name lecontei. 



Group III (edwardsi). 



The large stout forms, with very oblique and nearly straight sides 

 of the prothorax, constituting this group, are well known to all 

 collectors. They are apparently very circumscribed in habitat, 

 being confined to that part of the Sierras in and near Placer Co. 

 The elytra are frequently slightly brownish in tint, apparently not 

 always wholly because of immaturity. Having been fortunate 

 enough to personally capture a single example of the true edwardsi 

 on the shore of Lake Tahoe, I feel better prepared to separate the 

 various units in a more definite manner, for in most collections a 

 number of distinct modifications of the stem form figure under the 

 name edwardsi, which in its typical development inhabits only the 

 region near Lake Tahoe. There are two distinct types in the group 

 as follows: 



Elytral sculpture coarser and denser, the punctures rather close-set 

 suturally, becoming densely crowded on the flanks 2 



Elytral sculpture much finer, the punctures everywhere notably small, 

 widely separated suturally and never densely crowded on the flanks. . 3 



2 Form oblong-elongate, only moderately shining, black; head finely 

 and rather feebly rugulose, the front between the impressions nearly 

 smooth but without punctures; prothorax relatively smaller than 

 usual and less transverse, somewhat as in edwardsi, only a third to 

 two-fifths wider than long, finely and closely vermiculato-rugulose 

 throughout; elytra two-thirds to three-fourths longer than wide, 

 more oblong than usual, the sides less arcuate, widest at the middle 

 and less than one-half wider than the prothorax. Length (cf 9 ) 

 17.5-18.0 mm.; width 6.0-6.6 mm. California (Placer Co.). 



montanus Csy. 



