214 PROCEEDINGS OF THE ACADEMY OF 



Our species are numerous, and may be grouped as follows, in a tolerably 

 natural manner, though intermediate forms occur. The relation between the 

 groups and the sexual characters does not appear to be as precise in our 

 species as it was found by Suffrian in those of Europe. (Vide Stettin Ent. 

 Zeit., 1843, p. 91.) 



A. Extreme margin of elytra acute ; 



a. Body above coarsely punctured, glabrous or slight- 



ly pubescent : 

 *Marginal sulcus not distinct from the margin. (Group 1.) 



Black, elytra costate, margined with yellow 1. externa. 



Testaceous, elytra usually with black vittae : 



Elytra cribrate-punctate, thorax shining 2. crib rata. 



Elytra cribrate-punciate, thorax opake .3. americana. 



Elytra densely coarsely punctured, thorax opake 4. conferta. 

 Elytra densely less coarsely punctured, thorax 



opake 5. sex vit tat a. 



**Marginal sulcus distant from the margin, which is 



thickened, (color uniform dark red.) (Group 2.) 

 Body ovate, convex ; elytra cribrate-punctate : 



Thorax shining, deeply excavated 6. cavicollis. 



Thorax opake, deeply excavated 7- rufosanguinea. 



Body elongate, elytra densely punctured 8. hrematica. 



b. Body above not very coarsely punctured, serice- 



. ous pubescent ; never ovate convex : (Group 3.) 



Base of thorax sinuate each side near the angles 9. tuberculata. 



Base of thorax obliquely truncate each side : 



Thorax shining, with two deep excavations ; su- 

 tural angle of elytra prominent, side mar- 

 gin yellow : 



Elongate, elytra rather finely punctured 10. punctip en n is. 



Elytra less finely punctured : 



Elongate, angles of thorax scarcely prominent 11. marginella. 



Less elongated, angles of thorax prominent 12. sagittariaa. 



Thorax opake, bifoveate ; sutural angle not 

 prominent : 



Elytra not densely punctured, color brown 13. decora. 



Elytra not densely punctured, color entirely 



black 14. ca r b o. 



Elytra testaceous, with four black lines on each : 



1st and 2d vittse confluent behind the middle 15. n o t u 1 a t a. 



2d vitta very short, basal 16. not at a. 



2d and 4th vittae entire 17. i n tegra. 



c. Body above finely punctured, moderately pubes- 



cent, inferior margin of epipleurre obsolete 



near the tip. (Group 5.) 18. xa nt ho m e lae u a. 



B. Lateral margin of elytra obtuse, but slightly promi- 

 nent. (Group 6.) 



Elytra with very short pubescence 19. m ar it i m a. 



Elytra with moderately long pubescence 20. mor os a. 



Group I. Adimonia Laich. 



In this group the body is usually stout, ovate and convex, with the elytra 

 dilated behind, scarcely pubescent, and generally very eoarsely punctured ; 

 the thorax is short, narrowed in front, rounded on the sides, with the angles 

 frequently not prominent or dentiform. The wings are perfect in all our spe- 

 cies, though some European species are destitute of those organs. 



root. 



