322 Mr. J. S. Baly's descriptions of neio genera 



nigro-piceis ; supra picea, antennis nigris ; elytris fuscis, 

 tenuiter punctatis, pone medium nigro-piceis. 

 Long. 2 lin. Hab. — Amazons. 



Head triangular ; vertex slightly thickened, very finely 

 punctured ; encarp^ obsolete ; carina strongly raised, elon- 

 gate; antenuEe with the three lower joints pale piceous, the 

 rest black ; second joint short, ovate, the third slender, 

 filiform, twice the length of the second, fourth equal in 

 length to the third. Thorax more than twice as broad as 

 long ; sides straight and quickly converging from base to 

 apex, slightly sinuate behind the anterior angle, the latter 

 obliquely truncate ; basal margin bisinuate on either side, 

 medial lobe slightly produced, obtusely truncate; upper 

 surface finely punctured. Elytra less closely punctured 

 than the thorax. Hinder tibi» nearly straight, slender at 

 the base, gradually thickened towards the apex. 



Genus Megistops, Boh, 

 Megistops ornatus. 



Ovalis, convexus, pallide piceus, nitidus, capite, antennis 

 extrorsum, femoribus posticis apice tarsisque, rufo-piceis ; 

 thorace crebre punctato, laeviter ruguloso ; elytris rufo- 

 piceis, tenuiter, sat crebre punctatis, utrisque maculis 

 duabus, prima oblonga, a basi fere ad medium extensa, 

 secunda pone medium posita, subrotundata, fulvis. 



Long. 1§ lin. Hab. — Amazons ; Santarem. 



Head exserted, rotundate ; eyes large, contiguous ; en- 

 carp^e well defined, transverse, contiguous ; carina raised, 

 elongate ; antennse half the length of the body, four loAver 

 joints pale piceous, the rest nigro-piceous. Thorax nearly 

 three times as broad as long ; sides converging from base 

 to apex, nearly straight, anterior angles oblique, obtuse ; 

 above transversely convex, closely punctured, finely rugu- 

 lose. Scutellum trigonate. Elytra much broader than 

 the thorax, ovate, finely and closely rugulose-punctate, the 

 puncturing less crowded towards the apex, the interstices 

 on that portion of the elytron smoother and less distinctly 

 rugulose. 



Megistops pretiosus. 



Anguste ovalis, fulvus, nitidus, capite pedibusque pos- 

 ticis piceo-fulvis ; antennis, basi exceptis, nigris ; thorace 



