448 Mr. C. 0. Waterhouse on new Coleoptera. 



fifth broader than lono;, venj strongly and rather closely 

 punctured ; the sides slightly flexuous ; somewhat suddenly 

 narrowed at the anterior angles. Elytra evenly convex, de- 

 clivous at the apex ; very strongly and rather closely punc- 

 tured ; the punctures irregular in shape and rugose at the 

 bottom. Prosternal process punctured in the middle. Abdo- 

 men with very short pale pubescence at the sides and apex of 

 the segments. 

 Hab, Brazil? 



Heteromera. 



Eutelidae. 



Mechanetes, n. gen. 



General appearance of Diceroderes. Mentum a little 

 broader than long, gently emarginate in front, the angles 

 much rounded, the sides slightly rounded ; the base narrow. 

 Ligula transverse, gently emarginate in front, with the angles 

 rounded. Labial palpi short and thick, the apical joint a 

 little longer than broad. Apical joint of the maxillary palpi 

 large, about one third longer than broad, rather broader at 

 the apex than at the base, slightly curved, truncate at the 

 apex. Mandibles bifid at the apex. Labrum prominent, 

 short and transverse, with the angles rounded. Epistome 

 separated from the forehead by a not very distinct impressed 

 line. Eyes transverse, narrow, lunulate. Antennae mode- 

 rately long, robust ; the second joint very short and broad, 

 third joint as long as the first and second together, the fourth 

 joint a little more than half the length of the third, the fifth 

 to eighth joints subequal ; the ninth, tenth, and eleventh' 

 joints forming a distinct, oblong-ovate, compressed club ; the 

 divisions between the joints not very distinct. Thorax a 

 little longer than broad, slightly narrowed at the base ; with 

 two long, thick, curved, acuminate, horizontal horns, one on 

 each side of the anterior part of the disk, and projecting on 

 each side of the head. Elytra at the base the same width as 

 the base of the thorax, rather wider in the middle, embracing 

 the abdomen (as in Diceroderes) , flattened on the back, decli- 

 vous at the apex, striate-punctate ; each elytron witli an 

 obtuse undulating costa extending from the shoulder to the 

 posterior declivity. Prosternal process curved down poste- 

 riorly ; mesosternum oblique anteriorly. Metasternum very 

 short. Intercoxal process of the abdomen broad ogival. 

 Tarsi clothed beneath with moderately fine but not very dense 

 hair. Anterior femora with a small but strong tooth on the 



