AMERICAN COLEOPTERA. 5 



Thorax wider than the base of the elytra, margin usually well defined, 



lateral and visible in its entire extent from above 1. 



Thorax not wider than the elytra, margin extremely narrow, becoming 



inferior at least posteriorly or often nearly obliterated behind 8. 



1. — Sculpture above very coarse, punctures large and deep obliterating the 

 intervals (excepting the third which is subcostiforin). Sody above 

 greenish bronze without ornamentation. Thorax without marginal 



spot cuprina. 



Sculpture above finer, punctures small, intervals distinct. Body above 



ornate. Thorax margined with yellow 2. 



2. — Thoracic margin rather wide distinctly reflexed 3. 



Thoracic margin very narrow not reflexed 7. 



3, — Last ventral segment with well denned double margin 4. 



Last ventral with scarcely a trace of subapical carina 6. 



4. — Thorax rather suddenly wider at base than the elytra, sides feebly arcuate 



or nearly straight, rapidly converging to apex ainplicollis. 



Thorax but little wider at base than elytra, sides arcuately and gradually 



narrowing to apex 5- 



5. — Prosternum coarsely and rather densely punctured opacula. 



Prosternum very finely and sparsely punctured amabilis. 



6. — Elytral ornamentation consisting of a marginal band extending to middle 

 and broader behind, and a broad transverse band near the tip enclosing 



three spots fiavoiiiarginata. 



Elj'tral ornamentation of four narrow transverse bands very irregular and 



much interrupted... iiiacra. 



7. — Body above black, thorax yellow at the sides; elytra with four transverse 

 bands interrupted at suture, the anterior arcuate to the front. ..roblista. 



8. — Thorax margined with yellow 11. 



Thorax unicolored.. 9. 



9. — Abdomen at sides more densely and finely punctured than at middle and 



clothed with long white hair pubiventris. 



Abdomen equally and sparsely punctured and with very little pubes- 

 cence 10. 



10. — Thorax ratiier densely punctured ; elytra coppery bronze with large irregu- 

 lar reddish spots arranged as four transverse interrupted bauds; punc- 

 tures near the tip rather fine, intervals very little more convex at tip 



than on the disc plagiaticaiida. 



Thorax densely punctured; elytra blackish and with numerous very small 

 spots scattered over the surface. Striae at tip coarsely and deeply punc- 

 tured, intervals very convex iiiiliaris. 



Thorax very sparsely punctured; elytra black shining and with a few 

 small spots irregularly scattered. Intervals at tip leebly convex, the 



striae, moderately punctured sparsa. 



11. — Thorax very sparsely punctured in the median depression, elytra with 



three bands interrupted at middle and an apical spot tuta. 



Thorax as densely punctured in the impression as in front, elytra orna- 

 mented as in amplico/lis or connexa Hepburuii. 



A. cnprina. Spin. — Form elongate triangular, depressed, broadly obtuse 

 in front, color dark greenish bronze moderately shining, sparsely clothed with 

 erect black hair. Head densely punctured, vertex longitudinally impressed 

 and with a feeble carina posteriorly. Thorax more than twice as wide as long, 



