198 NEW SPECIES MELYRIDAE, CHRYSOMELIDAE AND TENEBRIONIDAE 



TENEBRIONIDAE. 



Centrioptera pectoralis, new species. Form elongate and sub- 

 parallel. Color black and more or less shining. Pronotum extremely 

 finely and sparsely punctate ; elytra with distinct and rather stout muricate 

 tubercles laterally and on the apical declivity. 



Head less than moderately convex, fronto-epistomal margin quite 

 evenly arcuate, feebly deflexed apical margin scarcely truncate or slightly 

 sinuate at middle; punctuation very irregular, leaving large smooth 

 areas ; punctures moderate in size and sharp across the middle of the 

 frons and at periphery of the epistoma. Antennae slender, joints equal 

 in width and elongate, tenth equilaterally triangular, not at all large, 

 eleventh small and short, pointed oval. 



Pronotum about a fourth wider than 'long; sides broadly and evenly 

 arcuate in anterior two-thirds, thence broadly sinuate to the basal angles 

 which are subrectangular, marginal bead moderately coarse and slightly 

 reflexed ; apex broadly emarginate between the rather acute and anteriorly 

 prominent angles ; base broadly and feebly emarginate ; disk moderately 

 and rather evenly convex, slightly more declivous at the apical angles, 

 scarcely transversely impressed before the base, punctuation extremely 

 fine and sparse, scarcely granulate or more distinct at the sides. 



Propleura smooth, opaque with a few punctures anteriorly 



Elytra oblong, about a half longer than wide, not strongly convex 

 centrally but more strongly and arcuately so laterally; sides broadly and 

 feebly arcuate, parallel, slightly wider behind the middle, apex rather 

 broadly rounded ; disk moderately convex, rather abruptly and obliquely 

 declivous posteriorly ; central area with simple punctures, laterally and 

 on apex the punctures of the intervals are replaced by strong and moder- 

 ately large muricate tubercles, the punctures and tubercles serially 

 arranged ; punctures equal in size, those of the striae not muricate and not 

 closely placed, those of the intervals in the central and sutural area more 

 distantly spaced and more or less granulate ; base scarcely arcuate, humeri 

 obtuse and not at all prominent. 



Parapleura moderately coarsely and sparsely punctate. 



Sterna. Prosternum glabrous laterally and anteriorly along the 

 margin, elsewhere coarsely rugoso-punctate ; process broadly and slightly 

 impressed, apex sublaminately but briefly mucronate, mucro small and 

 variable. Mesosternum moderately declivous, then briefly vertical, very 

 coarsely rugoso-punctate, narrowly glabrous between the coxae. Meta- 

 sternum coarsely and sparsely punctate. 



Abdomen horizontal and not strongly convex, with large glabrous and 

 impunctate areas, punctures rather coarse, most in evidence on the process, 

 sides and fifth segment, a few scattered across the other segments. 



