302 Memoirs on the Coleoptera 



Lissomenes n. gen. 



In this genus the beak is also notably short, and is compressed, 

 so that its depth is materially greater than its width, but with the 

 sides evenly convex and not at all flattened. The antennas are 

 short and medial, the first funicular joint about as long as the 

 next three, the seventh unusually modified, being large, dilated to 

 the width of the base of the club, which it resembles in its fine 

 opaque sculpture, and longer externally than internally, the club for 

 this reason gradually formed; it is as long as the four preceding 

 joints, oval, with its basal segment about half the mass. The 

 prosternum is flat, with a simple transverse anterior fossa, and 

 separates the coxae by a little less than half their width. The legs 

 are of normal type, the third tarsal joint dilated and bilobed, the 

 claw-joint of the usual size and curvature. The prothorax is 

 narrowly tubulate at apex, the base broadly arcuate, without 

 definite median lobe, but with a small and shallow sinus at the 

 scutellum, which is less free than in the two preceding genera, 

 oblong, parallel and with a few minute punctures, the elytra with 

 even and feebly punctulate, rather deep grooves. The entire under 

 surface is glabrous, the met-episterna without trace of the squamules 

 of the preceding genus. The type is as follows: 



Lissomenes aequalis n. sp. — Oblong, only very moderately convex, glabrous, 

 shining and deep black throughout; beak (9) about three-fourths as long as 

 the prothorax, feebly, but in distal half more strongly and obliquely, arcuate, 

 separated from the head by a rather deep sulcus; antennae piceous; prothorax 

 fully a third wider than long, the sides parallel and broadly arcuate, increasingly 

 so beyond about the middle, the tubulation much less than half as wide as the 

 base; punctures rather small but deep and conspicuous, separated by two or 

 three times their diameters, stronger but not dense at the sides, the discal part of 

 the surface only feebly convex, rapidly more so laterally; smooth median line 

 narrow and partial; elytra a little less than one-half longer than wide, the sides 

 slightly oblique and feebly arcuate, gradually rounding posteriorly through the 

 circularly rounded apex, very slightly wider than the prothorax and between 

 two and three times as long, the humeri slightly tumid; striae rather deep but 

 not sharply grooved, a third or fourth as wide as the intervals, which have single 

 series of rather small but evident, well separated punctures; abdomen convex, 

 very finely, remotely punctate throughout. Length 4.0 mm.; width 1.65 mm. 

 Brazil (Chapada). November. One specimen. . 



The type has no trace of abdominal sexual modification and is 

 therefore a female, in all probability. The upper surface is much 

 less convex than in the two preceding genera, and it therefore, 

 doubtless, has a very different habitat. 



Somenes n. gen. 



The body in this genus is rather stout, oblong and convex, 

 somewhat as in Eusomenes, but is apt to have rather conspicuous 



