AMERICAN COMPONENTS .OF THE TENTYRIIN^ 477 



punctured, obliquely reflexed at the sides ; prothorax scarcely as 

 long as wide, widest and laterally subangulate at basal third, the 

 sides thence feebly converging and nearly straight almost to the 

 obliquely rounded apical angles and more convergent and almost 

 straight to the very obtuse, l)lunt anil not at all prominent basal 

 angles, the base very broadly, feebly lobed, the lobe broadly and 

 rectilinearly truncate ; surface with the two siiuious ridges very 

 feeble, deeply impressed behind the middle at each side, the shin- 

 ing black tubercles moderately large, close-set throughout, except 

 narrowly along the median line posteriorly and along the inner and* 

 outer slopes of the ridges, those areas being devoid of tubercles ; 

 elytra fully twice as long as wide, more than twice as long as the 

 prothorax and much wider, parallel, circularly rounded behind, 

 finely emarginate at the suture, the humeri obliquely subprominent, 

 the sides behind them feebly sinuate, the surface of each with a 

 feeble ridge at outer third from the base for two-fifths the length, 

 another at inner third from just before the middle to the apex, 

 becoming irregular behind and including the inner of the three 

 tuberosities, and a very fine short ridge externally near the middle, 

 the shining tubercles small and rather sparse ; prosternum concave 

 between the coxa^. Length iS.o mm.; width 6.0 mm. Mexico 

 (Jalapa) * longipennis n. sp. 



Pronotum elevated feebly along the median line, more broadly behind 

 and separated from the sinuous ridges by broad feeble sinuous 

 channels, the base not extending laterally beyond the basal angles 

 of the elytra, the latter each with three tuberosities at the upper 

 part of the declivity forming a more elongate triangle, with its 

 longest base parallel to the suture 2 



2 — Body parallel, slightly convex, black, the decumbent fulvous 

 squamiform hairs evenly, though not at all densely, distributed ; 

 head obliquely elevated at the sides, simply strongly punctured 

 anteriorly and laterally but densely tuberculose posteriorly ; pro- 

 thorax widest before the middle, about a sixth wider than long, 

 parallel, the sides broadly, subevenly arcuate to the slightly obtuse 

 and not rounded but non-prominent basal angles, the base broadly, 

 arcuately lobed, the two sinuous ridges moderate, gradually flat- 

 tening out anteriorly, the surface thickly studded throughout with 

 large convex and polished tubercles, w^anting in the concavity just 

 without the sinuous I'idges near the middle ; elytra evidently wider 

 than the prothorax and twice as long, the humeri feebly oblique, 

 extending laterally beyond the thoracic angles, the base broadly 

 sinuate ; surface unevenly and feebly pitted and with scattered 

 tubercles, smaller and sparser than those of the pronotum, though 

 equally large in single close lines on the summits of the ridges, 

 the latter short and indefinable, one at the base of each elytron 

 inside the median line, another, feeble, on the median line from 

 near the base to about the middle and another, similarly feeble, 

 outside the median line from basal fourth to behind the middle, 

 the humeri also tumid; under surface finely, sparsely pubescent 



