200 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Head a little less than twice as wide as long, and scarcely one-half 

 as wide as the pronotum ; surface plane to slightly convex, frequently 

 more or less impressed along the frontal suture, sometimes trans- 

 versely so between the eyes, and laterally within the moderately 

 prominent sides of the frons, opaque, moderately, coarsely, irregu- 

 larly, and densely punctate, usually with small impunctate areas. 

 Antennw rather stout, scarcely reaching the prothoracic base ; outer 

 four joints slightly compressed and just 2)erceptibly dilated; third 

 joint about equal to the next two combined ; fourth, distinctly longer 

 than the fifth ; the latter to the seventh, inclusive, subequal and 

 slightly longer than wide; eighth, triangular and about as long as 

 wide ; ninth and tenth, suborbicular ; eleventh, short ovate. 



Pronotmn widest at the middle and about one-half wider than 

 long; disc opaque, smooth, slightly convex, finely and sparsely punc- 

 tate, with small impunctate areas about the center, frequently with 

 irregular impressions; laterally longitudinally impressed from within 

 tlie apical angles to a very short distance in advance of the basal 

 angles, terminating in feeble basal impressions, the depressions are 

 generally transversely rugulose; apex deeply emarginate and more 

 or less obsoletely margined; sides broadly and more or less strongly 

 reflexed, evenly arcuate or sometimes very feebly and broadly angulate 

 at middle, slightly sinuate in front of the basal angles, marginal 

 bead moderately coarse; hase truncate and feebly trisinuate, dis- 

 tinctly margined, two-fifths to one-half wider than the apex; apical 

 angles acute, subacuminate, prominent and more or less everted; 

 basal angles rectangular. 



ProfleurcB opaque and smooth, very finely and sparsely to obso- 

 letely, muricately punctate, more or less rugulose at times, and de- 

 fined from the reflexed pronotal margin by a longitudinal concavity. 



Elytra oblong, one-third to twice as long as wide and more or less 

 opaque; hase feebly emarginate, and about equal to the contiguous 

 prothoracic base; humer't obtuse and not prominent, rounded be- 

 neath the basal angles of the j^ronotum; sides evenly arcuate to sub- 

 parallel, apex scarcely to feebly produced; disc plane to slightly 

 convex, very suddenly deflexed laterally, angle of deflexion forming 

 an acute and moderately reflexed margin, which becomes obsolete a 

 short distance before the apex, more or less suddenly obliquely de- 

 clivous posteriorly ; surface sulcate, intervals feebly convex, each with 

 a single series of rather distantly placed punctures, the four inner 

 sulci with but a single series of closely placed submuricate punctures, 

 remaining sulci with numerous closely and irregularly placed punc- 

 tures, which become denser and rather more strongly min'icate toward 

 margin; apical declivity somewhat more strongly sulcate and sca- 

 brous; inflexed sides not convex, obsoletely sulcate, irregularly and 

 muricately i)unctured. 



I 



