24 Memoirs on the Coleoptera 



moderate and only slightly prominent; anterior impressions small 

 and feeble; posterior superciliary puncture remote from the eyes; 

 antenna long, fully half as long as the body, fusco-ferruginous, the 

 third joint much longer than the fourth; prothorax slightly elongate, 

 the apex moderately sinuate, much wider than the base and with 

 rounded angles; sides broadly arcuate, becoming broadly sinuate 

 basally, broadly reflexed, especially at base, forming the foveal 

 cavity, the angles right, sharp; base feebly sinuate, arcuate laterally; 

 transverse impressions feeble, the stria sharp, impressed, subentire; 

 elytra elongate-oval, nearly twice as long as wide, almost one-half 

 wider than the prothorax, very oblique at apex, the sutural angles 

 briefly divaricate and obtusely subangulate; striae very fine; dorsal 

 punctures four, the first on the third stria, the others on the second; 

 met-episterna short, as wide as long; tarsi slender, the upper surface 

 finely and uniformly, longitudinally strigilate, and the fourth joint 

 feebly and symmetrically emarginate; posterior tarsi also with lat- 

 eral groove, the fifth joint scarcely ciliate. Length (9) 9-7 mm.; 

 width 3.7 mm. Mexico (Tres Marias, Morelos), — Wickham, 



*districtus n. sp. 



Tempora not tumid behind the eyes 2 



2 — Dorsal punctures of the elytra three in number. Body elongate, 

 rather convex, deep black throughout, the legs black, the surface 

 shining, the elytra opaculate; head large, fully five-sixths as wide as 

 the prothorax, with broad neck and moderate, rather prominent 

 eyes, the tempora feebly converging and slightly arcuate behind 

 them; posterior puncture fine and rather distant from the eyes; 

 anterior impressions long, oblique, very feebly and vaguely im- 

 pressed; palpi piceous-black; antennae piceous, black basally, less 

 than half as long as the body, compressed, the third joint distinctly 

 longer than the fourth; prothorax as wide as long, the sides sub- 

 parallel, broadly arcuate, becoming rapidly sinuate before the right 

 and very sharp basal angles, moderately and subequally reflexed 

 throughout; foveae feebly impressed, the surface flat thence to the 

 sides; impressions shallow, the stria fine; base rectilinearly trans- 

 verse, barely narrower than the sinuate apex, the apical angles 

 rather prominent and not rounded; elytra three-fourths longer 

 than wide, one-half wider than the prothorax, widest a little behind 

 the middle, the oblique apices very feebly sinuate, the sutural 

 tips rounded; striae fine, the intervals flat, the punctures all near 

 the third stria; met-episterna a little longer than wide; tarsi smooth 

 above, the anterior rather stout, parallel, the outer lobe of the fourth 

 joint distinctly more prolonged. Length (9) 10.5 mm.; width 

 4.0 mm. Mexico (Tres Marias, Morelos),- — Wickham. 



*logicus n. sp. 



Dorsal punctures two in number 3 



3 — Head short, scarcely longer than wide, the eyes rather small and but 

 slightly prominent, the pronotal foveae broadly concave, merging 

 gradually into the reflexed sides; dorsal punctures of the elytra 

 very remotely separated, the anterior near the base. Form slightly 

 more ventricose, black and shining, the legs and tarsi black, rather 



