173 



in front. Pronotum expanding at the posterior lobe ; median carina but 

 slightly prominent; humeral angles sub-distinct on the posterior lobe, ob- 

 tusely rounded ; anterior and middle lobes marked with minute, shallow 

 cells, each having a very minute tubercle in the center ; posterior lobe densely 

 punctured; posterior margin about right-angled ; apex rounded. Elytra and 

 wings passing the abdomen one-third their length. Posterior femora reach- 

 ing the apex of the abdomen. Prosternal spine large, curved backward, 

 hairy. 



Color. — Reddish-Ijrown, with a slight vermilion-tint. A yellow stripe 

 extends from the vertex along the middle of the head and pronotum, and also 

 upon the suture of the clased elytra as far as the tip of the abdomen. A 

 dai'k-brown line down the cheeks below the eyes. On the sides of the pro- 

 notum is a yellow stripe extending from the sub-marginal to the last cross- 

 incision, directed a little obliquely downward ; below this is a brown stripe ; 

 then a narrow yellow stripe directed obliquely upward ; lower margin yellow. 

 Elytra opaque and reddish at base, rest semi-transparent ; a narrow, white 

 stripe on the lower margin, next the base; the disk and apical half marked 

 with large, cellular, fuscous spots. Wings transparent ; nerves at the base 

 and inner portion yellowisii-white, of the other portions black. Legs bright 

 vermilion-red. Posterior femora have a row of black dots along the upper 

 and lower margins of the disk, and one through the middle ; spines of pos- 

 terior tibias yellow, tipped with black. Each segment of the abdomen has a 

 ring of dusky dots on its posterior margin. 



Male. — *Much smaller. Sub-anal plate prolonged, deeply notched at the 

 apex ; cerci very broad, straight, and truncate at the apex. 



Dimensions. — ? Length, 2 inches; elytra, 2.1 inches ; posterior femora, 

 1.16 inches; posterior tibiae, 1.05 inches. $ Length, 1.7 inches; elytra, 

 1.65 inches ; posterior femora, 1 inch ; posterior tibijB, 0.9 inch. 



North Carolina, Southern States, Florida, Alabama, Texas (Scudder) ; 

 Illinois, Tennessee, Mississippi, District of Columbia (Thomas) ; Virginia, 

 New York (?) (Drury). 



A. aiubig;iium,'' Thos., Geol. Surv. Terr., 1871, 447. 



Male atid female. — Very similar in size, markings, and carvings to A. 



* There has been much confusion in regard to the A. americanum, with which this 

 has doubtless been confounded, notwithstanding its large size, distinct markings, and 

 the very full description given by Drury as early as 1770. The markings and carvings 



