L--T 



JVorth American Coleopterous Insects. 



195 



honey-yellow vitta, external edge, and obsolete spot on 

 the basal middle : postpectus sericeous : feet honey-yel- 

 low ; tip of the posterior thighs, their tibiae and tarsi 

 dusky : abdomen honey -yellow. 



Length ^ nearly three fifths of an inch ; ? over four fifths. 



In the form of the thorax it Is more like M. bimaculdtus^ 

 Nob., than margindlis, but it is greatly superior in mag- 

 nitude to either, and very distinct as a species. 



m 



> 



,^ 



ACANTHOCINUS, Meg- 



#,. 



thorax 



A. quadrigibhus . Antennae annulate ; 

 bercled ; elytra with a cinereous spot on each. 



Inhabits Louisiana. 



Body dark brownish, when closely examined, varied 

 with ferruginous and cinereous, short, prostrate hair: an- 

 tenncB hardly longer than the body, blackish ; the joints, 

 excepting the basal ones, reddish cinereous at their bases ; 

 basal joint clavate : head before remotely punctured ; be- 

 hind the eyes, small, numerous punctures : labrum dull 

 honey-yellow : thorax with distant punctures ; four tuber- 

 cles nearly in a transverse line, and a longitudinal, ^e- 

 vated line : elytra quadrigibbous at base ; inner gibbosity 

 extended into a longitudinal elevated line, gradually de- 

 clining and terminating before the tip ; numerous, distant, 

 profound, punctures ; a dilated, undulated, cinereous spot, 

 before the middle; a sutural series of alternate, quadrate, 

 small brown and cinereous spots, nearly opposite ; tip 

 emarginate : thighs clavate. 



three filths ol an 



an 



debted to Mr. Joseph Barabino, who obtained it near 



Orleans 



