248 MEMOIRS ox THE COLEOPTERA 



to a less degree in aztecus; prothorax but little more than twice as 

 wide as long, the two anterior teeth small, the basal angles right, 

 feebly upturned and obtusely subprominent; punctures fine and 

 sparse, but little larger laterally; base broadly, feebly arcuate medi- 

 ally, the sublateral sinuses rather deep; scutellum very obtuse; 

 elytra barely three-fifths longer than wide, about a third wider than 

 the prothorax, parallel, with but feebly arcuate sides which converge 

 but very slightly near the broadly obtuse apex; punctures rather 

 large, deep, impressed and stellate, close-set posteriorly, smaller 

 and sparser basally, the raised lines fine but distinct; sterna densely 

 pubescent; abdomen glabrous and yellowish, the apical margin 

 of all the segments very finely piceous; tarsi slender. Length (cf) 

 34.0 mm.; width 13. 3 mm. New York. [CerambyximbricornislAnn., 



Syst. Nat., ed. XII, p. 622] imbricornis Linn. 



A -Much smaller and relatively narrower though similar in colora- 

 tion and sculpture, the antennae (c?) less elongate, extending but 

 slightly behind the middle of the elytra; prothorax similar but much 

 shorter, two and one-half times as wide as long, the hind angles 

 less blunt but not prominent; elytra more than three-fourths 

 longer than wide, about a fourth wider than the prothorax, sim- 

 ilarly parallel, the two inner raised lines stronger; tarsi still more 

 slender, the posterior more lineiform, with the second joint sub- 

 parallel and twice as long as wide. Length (cf) 27.5 mm.; width 

 10.0 mm. A single male without indication of locality. 



mimus n. subsp. 



B Form nearly as in imbricornis, very parallel though narrower, 

 similar in color but with coarser and much stronger elytral sculp- 

 ture; antennae (cf) extending to apical fourth of the elytra; head 

 small; prothorax still shorter than in mimus, more nearly three 

 times as wide as long, the median tooth relatively longer and very 

 acute, the anterior smaller and only obtusely prominent, the sides 

 behind the middle tooth more converging to the basal angles, 

 which are right and not everted though very sharp; lateral sinuses 

 of the base much shallower than in either of the preceding; elytra 

 nearly three-fourths longer than wide, more than a fourth wider 

 than the prothorax, very parallel, rapidly rounding at apex, the 

 latter very obtusely rounded; punctures notably large, deeply 

 impressed, rather close but irregular, smaller basally, the surface 

 more shining than in the two preceding, the two inner raised 

 lines strong; hind tarsi very slender, the pads beneath as in other 

 forms of this subgenus, much narrower and less dense than in 

 Prionus proper, the sulcus relatively wider. Length (c?) 25.0 

 mm.; width 9.6 mm. North Carolina (Southern Pines), Manee. 



brunneus n. subsp. 



Eyes much more distant, separated by three-fifths to nearly three-fourths 

 their own width; head black, rufescent anteriorly, the prothorax dark 

 testaceous, the elytra much less strongly sculptured and of a pale 

 tawny-yellow color, sometimes feebly rufescent basally. Body nar- 

 row, small in size, the elytra evidently narrowed from base to apex, 

 with feebly arcuate sides and not parallel or nearly so as in the three 



