122 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



tendency to arrangement in approximate rows of closely placed punc- 

 tures, with smaller and more widely spaced punctures between, most 

 evident in the smoother and less so in the duller and rougher forms; 

 punctures confused at the sides and scabrous with minute and slightly 

 elevated, appressed points which precede the punctures. 



Epipleurm moderately narrow, slightly widened at base beneath 

 humeri, thence gradually narrowing to apex, superior margin rather 

 strongly and broadly sinuate in basal fourth, scarcely visible from 

 above at the humeri; surface smooth, finely, sparsely or obsoletely 

 punetulate. 



Sterna more or less irregularly punctate and rugose. 



Parapleural: Mesosternal pieces quite strongly and rather densely 

 punctate; metasternal pieces rather sparsely punctate. 



Ahdomen more or less shining, finely and sparsely ])unctate, more 

 strongly so and rugulose between the coxse, with ])unctures denser on 

 the fifth segment. 



Legs rather slender and moderately long; anterior tibial spurs 

 unequal, the anterior a little longer and slightly stouter than the pos- 

 terior, both slender and acute/ anterior tarsi slightly dissimilar in 

 the sexes. 



Male. — Fusiform-ovate, some\Yhat elongate and more or less nar- 

 row. Antenna^ reaching slightly beyond the base of the prothorax. 

 Elytra distinctly and gradually narrowed behind, more or less gradu- 

 ally and arcuately or obliquely declivous posteriorly; abdomen more 

 or less slightly oblique, moderately convex, first segment flattened at 

 middle, with the intercoxal region more or less concave. Anterior 

 femora armed with a subacute tooth ; first joint of the anterior tarsi 

 clothed at tip beneath, with a small subtruncate tuft of golden 

 pubescence — usually darkly discolored; tip not very noticeably thick- 

 ened, groove interrui)t('d. 



Female. — Ovate, rather robust. Antenna^ reaching to the base of the 

 prothorax. Elytra arcuately and somewhat vertically declivous pos- 

 teriorly, moderately narrowing in apical fourth; abdomen horizontal, 

 strongly and eveidy convex, intercoxal process convex rather than 

 concave. Anterior femora nuitic, or at most but very feebly sinuate 

 in outer fourth: first joint of the anterior tarsi narrowly and trans- 

 versel}^ thickened at tij) beneath, with short piceous spinules, groove 

 interrupted at the ventral apical margin. 



In the material before me several forms should be recognized to 

 facilitate tli(» correlation of incipient races: 



Forma typica. — Shining. Elytra with the approximate I'ows of 

 moderately coarse punctures more or less evident and very feeblj^ 

 scabrous; pronotum finely punetulate. Legs moderate. 



