DESCRIPTIONS OF NEW SPECIES. 



Trigonurus Muls., with which I should associate it but for the 

 presence of very distinct ocelli. The head is narrow, with two 

 deep oblique impressions, at the hinder end of which, on a line 

 with the posterior limit of the eyes, are the ocelli. The thorax 

 is gradually widened behind, the anterior angles rounded, the 

 posterior ones rectangular; the base is truncate. The elytra are 

 wider than the thorax, very long, leaving exposed only two dorsal 

 segments, and broadly rounded at tip : they have each 9 punc- 

 tured striaB, and the alternate intervals have a few distant punc- 

 tures. The abdomen is acute at tip. 



206. T. striatus. Nigro-piceus, capite parce thorace fortiter hand 

 dense punctate, disco utrinque oblique impresso, lateribus rufo-testaceis 

 postice explanatis, elytris profunde striato-punctatis, vitta rufo-testacea 

 a huruero fere ad apicem extensa, antennaruni basi pedibusque testaceis. 

 Long. -18. 



One specimen, given me by Dr. C. Zimmermann. The sutural 

 stria curves around the tip of the elytra and runs into the outer 

 margin, the 2d unites with the external stria (9th), the 3d with 

 the 4th, and the 5th with the 8th, enclosing the extremities of the 

 6th and 7th. 



MICRAtYMMA WESTWOOD. 



207. Bf. stimpsouii. Nigrum fere opacum, punctulatum, thoraco 

 latitudine breviore, vitta angusta dorsali impunctata, elytris thorace 

 liaud longioribus, abdomine latiore, antennis articulo 3io tenui sequente 

 longiore. Long. -12. 



Coast of Maine ; collected by my friend Wm. Stimpson, to 

 whom I dedicate it as a slight acknowledgment of his most va- 

 luable researches in marine invertebrate zoology. 



This species is twice the size of the Greenland species, If. bre- 

 vilingue, and is readily distinguished by its dull, equably punctu- 

 late surface, and the thinner 3d joint of antennae. The thorax is 

 destitute of impressions. 



CORYPHIUM STEPH. 



2OS. C. pallidum. Fusco-testaceum fortiter punctatum, thorace 

 latitudine haud breviore, postice parum angustato lateribus serrulatis, 

 elytris fusco pallidoque variegatis. Long. -12. 



Kansas, one specimen. The fuscous marks of the elytra con- 



