OF THE COLEOPTERA LONGICORN1A OF THE UNITED STATES. 47 



125. A. MARGINELLUS. 



Robust, cinereous brown, elytra with a whitish band posteriorly, bounded with a black line anteriorly and pos- 

 teriorly; apical third brown. 9 mm. long; (elytra 7,) I wide. 



A. marginellus, Dej. Cat. — Cab. Le Contc. Front mottled with cinereous and brown, impressed between the 

 antenme; a narrow frontal line continued over the vertex, where it has a short, black band on each side; eyes, 

 mandibles, and maxillary palpi black, apex of the latter yellowish; labium and palpi yellowish; a glabrous, black 

 spot behind the eye; antenna; maculate and annulate, as in the preceding species, the scapus being maculate in 

 addition: pronotum unequal, medial line elevated, glabrous, widest posteriorly, where it forms a tubercle; lateral 

 tubercle posterior, obtuse, projecting; another intermediate between it and that of the dorsal line, an indistinct, cor- 

 date elevation anteriorly, and converging to the posterior dorsal tubercle: scutel and adjoining portion of the elytra 

 blackish: elytra slightlv truncate at lip, rough, with numerous elevations, cinereous brown, with a greenish tinge, 

 interspersed with black tufts, which form a sub-basal and post-medial macula, the latter diverging obliquely 

 backwards from the suture, which is dotted with black, epipleura greenish, irrorate with black, margin with a row 

 of black dots, a black, submarginal band from the shoulder to the middle, indistinctly continued across the 

 prothorax: feet and beneath with short, prostrate hair, spotted with brown; tibiae bi-annulate with blackish, tarsi 

 blackish. 



126. A. aculifera, Say. (Lamia.) Journ. Acad. Nat. Sci., iii. 329. 



Thorax unequal; elytra unequal, with numerous elevated points, aculeate, with a white band behind; tip entire. 

 Four lines long. 



I have not met with a specimen which could be detcrminately referred to this species. 



127. A.? cryptus, Say. (Lamia.) New species of insects, found by Joseph Barabno, in 

 Louisiana. 



Clothed with dark, ferruginous, prostrate hair. 64 lines long. 



1 2*. A. VARIEGATCS. 



Drown, spotted with black, elytra with two approximate costa; united posteriorly, with an intermediate black 

 spot behind the middle, bounded posteriorly by an elongate, cinereous spot. 4.j'" long; (elytra 3.',) lj wide. 



Ground-colour, reddish-brown; mouth pale, glossy, yellowish-brown; front slightly convex, covered with yel- 

 lowish, prostrate hair, sprinkled with black; medial line a dark streak, indented between the antenna.', and crossed 

 by a transverse, indented line at the posterior base of the antenna 1 , a glabrous point at the junction; antenna; 

 brown, scapus annulate in the middle, with cinereous, remaining articulations, with the basal third, of the same 

 colour: pronotum with minute, black punctures, a small, central black spot, and another on each side anteriorly, 

 forming a triangle; scutel black: elytra truncate at tip, surface with numerous, impressed punctures, each with 

 two longitudinal costa:, which unite near the apex, a cinereous spot lying in the commissure; costa:, suture, and 

 external margin marked with a row of black dots; beneath reddish-brown, scarcely hairy; feet annulate. 



Var. A. tri/asciatus. Mouth not yellowish; elytra with three, irregular, transverse, dark-brown bands, the 

 first sub-basal, extending outwards and forwards from the suture towards the shoulder, the second medial, and the 

 third in the line of the posterior black spot. Inhabits Alabama. 



Var. A. obtCUrUS. Very dark-brown, with three indistinct, black bands; beneath blackish-brown. 



129. \. < "MMIXTUS. 



Brown, with a few yellowish spots and numerous black tufts; pronotum finely and irregularly punctured; 

 elytra bi-costate, and thickly covered with large dilated, impressed punctures. 9£ mm. long; (elytra 7,) 1 wide. 

 Inhabits Washington City. 



Front covered with olivaceous hair, spotted with brown; labrum and clypeus yellowish-brown over the vertex; 

 a large brown spot at the inner base of the antenna;, and another on the vertex; antenna; cinereous, spotted and 

 annulated with brown; pronotum with an obsolete, black tubercle on each side anteriorly; scutel black, with a 

 few yellowish hairs; elytra with two costa: united towards the apex, inner one with a conspicuous, lengthened, 



