178 DESCRIPTIONS OF AND OBSERVATIONS ON 



not, or hardly, longer than the penultimate one : thorax on the lateral 

 edge rectilinear from before the middle to the tip of the posterior spine, 

 which is rather long, acute, carinate : scutel black : elytra with punc- 

 tured striae, and minutely punctured interstitial lines; on each a large 

 testaceous spot, extending from the base nearly to the middle, not 

 reaching the suture, and a smaller one beyond the middle : pectus in 

 the middle piceousryee/ honey-yellow : /am, penultimate joint minute, 

 but extended beneath into a lobe, almost half the length of the ulti- 

 mate joint. — Length from one-fourth to two-fifths of an inch. 



51. E. scapularis. Clypeus concave; antennae longer than the tho- 

 rax; humerus yellowish. — Inhab. Indiana. 



Head greenish black : clypeus somewhat prominent, obtusely round- 

 ed at tip, much indented above: antennae longer than (he thorax, ser- 

 rate; second joint one-third the length of the third, which is dilated at 

 tip like the following ones, and somewhat longer than the fourth : 

 thorax greenish black, rather long ; sides a little contracted before the 

 spines; spines robust, not attenuated, rounded at tip and yellowish: 

 scutel piceous: elytra dull yellowish on the basal margin; with rather 

 deep striae, punctured; interstitial lines rounded with transversely 

 confluent punctures : /ee/ piceous: if am with the second, third, and 

 fourth joints dilated beneath into rather short lobes, that of the third 

 much wider and more prominent; fourth joint more than half the 

 length of the third; ultimate joint equal in length to the first, and 

 equal to the second, third and fourth taken together — Length less 

 than two-fifths of an inch. 



This is rather slender, and the yellowish bases of the elytra are dis- 

 tinguishing and obvious characters. 



52. El. acanthus. Brown; clypeus concave above; spines com- 

 pressed, short, rounded. — Inhab. Indiana. 



Body rather slender, punctured: head blackish brown, with small 

 punctures more distant than the length of their diameters: clypeus 

 prominent, obtusely rounded before, and concave above : antennse longer 

 than the thorax, not serrate; second joint more than half the length of 

 the third: thorax blackish brown; long, lateral edge rectilinear, hardly 

 broader behind than before; anterior angles a little prominent, and 

 slightly truncate ; punctures not discoidal, small, profound, and more 



