78 MEMOIRS ON THE COLEOPTERA 



subbasal impressions large, shallow, prolonged obliquely nearly to 

 the basal angles; elytra but just visibly longer than wide, the sides 

 rounded, less so basally, the surface with widely separated geminate 

 series of very small and feeble punctures, the wider separating lines 

 broadly and very feebly convex, becoming gradually narrower and 

 stronger laterally; hind tarsi about as long as the tibiae. Length 

 34.0 mm.; width 14.0 mm. Florida Levette collection. 



strenuus Lee. 



A Similar but smaller, similar in form and in the shining lustre, the 

 lateral margins faintly violaceous; head not quite so large pro- 

 portionally, the mandibles similar, but the labrum differs de- 

 cidedly, the middle lobe not plicato-strigose but smooth, much 

 narrower, with its apex evenly and more strongly rounded and 

 separated from the equally advanced lateral lobes by deep and 

 narrow sinuosities, the small median punctures not so near the 

 apex; prothorax nearly similar, except that the parallel part of the 

 sides before the basal angles is very much shorter and differing 

 very markedly in having the basal groove continuous throughout 

 the entire width; elytra nearly similar in form but with the punc- 

 tures of the geminate series much stronger and very distinct, the 

 double series separated by rather strongly elevated ridges, which 

 are as usual gradually feebler toward the suture; hind tarsi nearly 

 similar though a little more slender. Length 29.5 mm.; width 12.4 

 mm. Florida. A single example from an unrecorded source. 



robustus n. subsp. 

 Body less convex and very much smaller in size, the humeral carina 



long, evenly continuous with the inner lateral ridge 6 



6 Entire surface of the elytra deeply, coarsely, closely and almost evenly 

 sulcate, the furrows equal in width to the ridges, slightly alutaceous 

 and each with two series of fine and feeble punctures. Body sub- 

 depressed, elongate-oval, black with strong violaceous lustre through- 

 out above, deep black beneath, the anterior parts having a faint 

 violet-blue lustre; head very moderate, not three-fifths as wide as 

 the prothorax, the two impressions distinct but narrow; mandibles 

 smooth, with a few striations near the tooth; labrum nearly smooth, 

 with two large excavations separating the three small lobes, the 

 median lobe slightly the more advanced, smooth and arcuato- 

 truncate; prothorax nearly one-half wider than long, about as 

 wide at base as at apex, the sides broadly lounded, very feebly 

 sinuate toward the right basal angles, the unusully narrow marginal 

 groove interrupted before the base, the groove along the basal margin 

 entire but not quite attaining the basal angles; surface with strong 

 median stria and four subbasal impressions, the inner elongate, the 

 outer near the angles and small; elytra about a fourth longer than 

 wide, the ridges subequal throughout the width, their black color 

 and shining lustre contrasting with the pure violet and duller inter- 

 spaces, the two lateral ridges not distinctly differentiated from the 

 others, the third and fifth of which gradually become obsolete 

 behind; posterior tarsi slender, about as long as the tibiae. Length 



