OF THE COLEOPTERA I.ONC.ICORNIA OF THE UNITED STATES. 13 



'NOTH1US. (Plectrocerum? Dej.) 

 Body slender; antenna setaceous, longer than the body, fringed beneath with a row of fine 

 hairs, scapus enlarging rapidly to the apex, pedicellus one-fourth the length of the third 

 articulation, which is equal to the fourth, fifth longest, eleventh shorter than the penul- 

 timate: prothorax elongate, sides continuous with the head, slightly convex, suddenly 

 diminished posteriorly; a wide depression along the dorsal line: scutel rounded at tip: 

 elytra parallel, llattcncd above, apex conjointly rounded: feet slender, femora clavate. 

 Facies of Ancyloccra. 



102. N. fusctjs. 



Pale-brown, slightly reddish beneath, eyes black. 2.}"' long; (elytra U,) '■ wide. Cab. Le Conte. 

 Antenme slightly hairy : pronotum with a broad depression along the dorsal line, which widens and turns 

 outwards posteriorly; and with the elytra clothed with short prostrate hair: femora strongly clavate. 



PLECTROMERUS, Dejean. 



103. P. dentatus, Le C. Ann. Lye. N. York, i. 172, pi. 11, fig. 11. 



101. P. CONCINNATLS, Dej. 



2 J'" long. Pale-brown, elytra with three longitudinal darker spots; femora mutic. 



IIETERACHTHES, Newman. (Ibidion, Dej. Cat.) 



Body slender, prothorax cylindrical, twice as long as the head, narrowed posteriorly: 

 antenna eleven-jointed, setaceous, and as long as the body in the female, first joint 

 double the thickness of the remainder, second minute, subglobular, third considerably 

 the longest; and most of them slightly thickened at the end; in the male, first and 

 second as in the female, third thicker than the first, and with the fourth, fifth and sixth 

 cylindrical, rounded at both ends, seventh and succeeding ones suddenly reduced in thick- 

 ness, and resembling those of the female; slightly fringed beneath in both sexes: scutel 

 rounded: elytra slender, mutic: extremity of the femora inerassated. 



10."). 1 1. 1-M.U X'LATUM. 



Testaceous two yellow circular spots near the middle of the elytra. 1 — 5 lines long. Nab. Pennsylvania: 

 Carolina in July. 



Rhagium -1-maculatum. Mcls. Cat., 789. Boston Coll., No. 741. 



A slender insect, with prominent eyes projecting beyond the prothorax, the latter willi 

 a wide, shallow transverse groove before the middle, and another at the posterior ex- 

 tremity; elytra with piliferous punctures. 



Vab. pallidum. Pale, posterior spots wanting. Three lines long. 



10G. II. erenus, Neu-man, ditnidiaticorne, Dej. 



Very slender, uniform atropurpureous; head and prothorax minutely granulate; dorsal line smooth; elytra 

 with a slight humeral depression. \\'" long; \ wide. 



STIZOCERA, Scrv. Ann. Ent., iii. 107. 



Body slender, subcylindric, with numerous impressed punctures: head large, eves deeph 

 emarginatc and prominent, antenna.- as long as the body, setaceous, articulations cyliu- 



