76 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Female. — Form slender, more or less linear like in otiosus, and 

 rather strongly shining ; head reddish cupreous, and slightly aeneous 

 toward the sides; pronotum brown, with a distinct cupreous tinge; 

 elytra brownish black, with a feeble aeneous reflection; beneath 

 black, with a slight aeneous or greenish reflection in certain lights, 

 and more shining than above. 



Head with the front wide, feebly convex, nearly equal in width at 

 top and bottom, and the lateral margins vaguely, arcuately expanded 

 at middle, and with a vague longitudinal groove on vertex and occi- 

 put; surface finely, densely granulose, sparsely, coarsely punctate, 

 finely, transversely rugose behind epistoma, and clothed with a few 

 indistinct hairs; epistoma slightly transverse between the antennae, 

 and broadly, arcuately emarginate in front; antennae extending to 

 middle of pronotum, serrate from the fourth joint, and the outer 

 joints about as wide as long; eyes large, elongate, and slightly more 

 acutely rounded beneath than above. 



Pronotum about one-third wider than long, base and apex about 

 equal in width, and widest along apical half; sides nearly parallel 

 or feebly sinuate from apical angles to middle, then obliquely nar- 

 rowed to the posterior angles, which are rectangular; when viewed 

 from the side the marginal and submarginal carinae are nearly 

 straight, rather broadly separated anteriorly, and connected to each 

 other at base; anterior margin rather strongly sinuate, with the 

 median lobe broadly rounded and rather strongly produced; base 

 transversely bisinuate, the median lobe feebly produced, and arcu- 

 ately emarginate in front of scutellum ; disk moderately convex, with 

 two broad, shallow depressions arranged longitudinally at the middle, 

 a moderately deep, broad depression along lateral margin extending 

 from apical fourth to base, and with obsolete prehumeral carinae. 

 Scutellum strongly, transversely carinate, and the surface finely 

 reticulate. 



Elytra slightly wider than pronotum at base, and about equal in 

 width at base and apical third; sides broadly, arcuately constricted 

 in front of middle, broadly, arcuately expanded at apical third, then 

 obliquely narrowed to the tips, which are separately, very broadly 

 rounded or subtruncate, and coarsely, irregularly serrate; sides of 

 abdomen narrowly exposed above; disk feebly convex, sutural mar- 

 gins elevated posteriorly, with broad, shallow, basal depressions, and 

 with only a vague trace of longitudinal costae ; surface rather coarsely 

 imbricate-punctate anteriorly, becoming smoother toward the apex. 



Abdomen beneath finely, densely granulose, coarsely punctate on 

 basal segments, becoming finely, sparsely punctate toward the apex, 

 ihe punctures connected transversely by fine sinuate lines on the basal 



