Platynin,*: 25 



convex, the elytra only slightly alutaceous; head not over three- 

 fourths as wide as the prothorax, with very broad neck; tempora 

 feebly converging and slightly arcuate; anterior impressions small 

 and feeble; antennae not quite half as long as the body, piceous, 

 the third joint but little longer than the fourth; prothorax fully as 

 wide as long, widest near the middle, the sides broadly and sub- 

 equally rounded, becoming rapidly and moderately sinuate nearer 

 the base than usual, strongly reflexed throughout; base slightly 

 arcuate at the sides, with right and scarcely blunt angles, fully as 

 wide as the apex, which is feebly sinuate and with roundly tipped 

 angles; transverse impressions feeble, the stria finely impressed; 

 elytra one-half longer than wide, two-fifths wider than the pro- 

 thorax, the humeri a little less gradual than in the two preceding, 

 the apex bluntly ogival, the sinus very feeble, the sutural angles 

 evenly rounded; striae moderately fine, slightly impressed, smooth; 

 intervals not quite flat; met-episterna somewhat elongate; tarsi 

 slender, smooth above, the fourth joint feebly and symmetrically 

 emarginate. Length (9) 9.0 mm.; width 3.6 mm. Mexico 

 (Guerrero), — Baron *barom n. sp. 



Head elongate, with better developed and prominent eyes; pronotal 

 foveae linear and separated from the sides by a convex surface; 

 dorsal punctures of the elytra less widely separated, the anterior 

 at or slightly before the middle; body less abbreviated and less 

 ventricose, the elytral sides more gradually rounding basally 4 



4 — Form moderately slender and convex, black, piceous beneath, the 

 legs black; surface strongly shining, the elytra not opaculate; head 

 narrower though nearly four-fifths as wide as the prothorax, the 

 tempora rapidly converging and feebly arcuate; superciliary punc- 

 tures as in the preceding species; anterior impressions moderately 

 long, feebly impressed; antennae piceous, less than half as long as 

 the body, strongly compressed, the third joint distinctly longer than 

 the fourth; prothorax as wide as long, the sides subevenly rounded 

 and rather strongly, subequally refiexed, becoming oblique and 

 gradually feebly sinuate basally, the angles slightly more than right, 

 with narrowly blunt tips; base slightly arcuate throughout the 

 width, not quite as wide as the apex, which is moderately sinuate 

 and with blunt angles; transverse impressions distinct, the stria 

 fine, biabbreviated; elytra three-fifths longer than wide, more than 

 one-half wider than the prothorax, rapidly and notably obtuse at 

 apex, the sinus long and very feeble, the tips evenly rounded; striae 

 smooth, rather fine, becoming coarser at tip, sharply defined; 

 intervals virtually flat; anterior puncture at or just behind the 

 middle; met-episterna slightly longer than wide; tarsi slender, 

 smooth above. Length (9) 8.8 mm.; width 3.4 mm. Mexico 

 (Tres Marias, Morelos), — Wickham *inorelosensis n. sp. 



Form nearly as in the preceding but with the elytra less obtuse at apex, 

 the rounded tips rather more prolonged, similar in coloration and 

 lustre; head not so narrow and with still wider neck, more than 

 four-fifths as wide as the prothorax, the rather long anterior im- 

 pressions more oblique; antennae nearly similar; prothorax of 



