OF THE COLEOPTERA LONGICORMA OF THE UNITED STATES. 45 



M. CORNI. Black; prolhorax rufous, punctured, a small polished tubercle each side of the dorsal line before 

 the middle, and a longitudinal one behind, forming an equilateral triangle with them; elytra punctured; antennae 

 about as long as the body. Three lines long. 



Molorchus Corni, Hentz, MS. Boston Coll., No. 782. M. ruficollis? Drj. Cat.— Cuba. Inhabits Carolina 

 io March — May, upon the flowers of cornus. 



The insect described under the name of Molorchus marginalia, by Say, in Long's 

 Expedition, ii. 292, is a Malthinus. 



LAMIAD/E. 



MONELERMA, Say. Joum. Acad., iii. 403. 

 11G. M. anmlata, Say. Joum. Acad., iii. 404. Inhabits Missouri Territory. 



ACANTIIODERES, Scrv. Mulsant, 143. 



117. A. qtjadrigibbus, Say. Bost. Journ., i. 19"). 



Inhabits near New Orleans, Say: Carolina in May and June, Hentz: Pennsylvania, Dr. Mclsheimer. Boston 

 Coll., No. 1039. A. distinctus, JJejean. 



118. A. triangulifer. 



Dull reddish-brown, elytra with a large, irregular triangle behind the middle, running from the outer margin to 

 near the suture; and a small one near the apex. 6'" long; 2j wide. Inhabits Alabama. 



Robust, antenna: annulate with cinereous on the basal half of the articulations : sides of the prothorax cinereous, 

 with a black spot in front of the spine; a black spot on each side above: scutel and adjoining portion of the elytra 

 black: elytra slightly emarginate, covered with small impressed punctures: feet annulate, with cinereous; segments 

 of the venter margined with black. 



JEGOMORPIIUS, Dejcun Cat., p. 363. 



Distinguished from Acanthoderes by bavin?; the antennae sliiditlv fringed beneath; and 

 an additional spinosc tubercle on each side of the prothorax above. 



1 19. JE. DECIPTENS. 



Cinereous brown, punctured; front plane, whitish; elytra with three obscure, oblique, subparallel bands, middle 

 one undulated. 0"long; 24 wide. Cab. Lc Conte. 



Front and labrum covered with short, whitish hair, sprinkled with a few minute, black dots; frontal linn im- 

 pressed; vertex with a slight, dark elevation between the medial line and eves; mandibles black ; eyes reddish- 

 brown, with a brassy reflexion; antennae reddish-brown, annulate with cray: prothorax cinereous, with numerous 

 dark, dilated, impressed punctures; a conspicuous black, smooth tubercle each side of the dorsal line; lateral 

 spines direct, punctured posteriorly; dorsal line marked by the lighter colour of the hair, which is continued upon 

 the scutel, and bounded upon the latter and posterior extremity of the former with a lateral black line: elytra with 

 an indistinct, oblique, black band from near the base of the suture, towards the humeral angle; an undulated, 

 W. shaped, post-media] one; and a small one near the apex, bounded by a black dot exteriorly; suture cinereous, 

 marked posteriorly with a row of about eight black dots; external margin similarly marked; apex truncate, 

 scarcely emarginate separately; external side slightly produced: feet reddish-brown ; femora clavatc, covered with 

 cinereous hair; tibia^ annulate with the same material; inferior parts testaceous, slightly clothed with cinereous. 



Tlir ground colour, where it ran be distinguished, seems to be uniformly testaceous. 

 120. 1' \ second -|ii i h ■-■, too imperfect to admit of description. 



VOL. X.— 12 



