282 Natural History Bulletin. 



Varies in brightness of colors and strength of punctuation. 

 Habitat. From the Atlantic coast to the Missouri river, 

 north of the latitude of Tennessee. 



B. dentata, Say. Brownish-black, minutely punctulate, 

 pubescence dense, elytra and legs paler, reddish, palpi red. 

 Length, 1.8 mm. Plate IX., Fig. 56. 



Head with the frontal margin arcuate in the middle, the 

 antennal tubercles sharply angulate laterally, occipital foveae 

 mutually three times as distant as either is from the eye. 

 AntenncB less than one-half as long as the body, first, second 

 and third joints cylindrical, gradually smaller, fourth, fifth 

 and sixth a little larger, seventh and eighth again smaller, 

 ninth and tenth much larger, the tenth joint is twice as long 

 and thick as the ninth which is obconical and as thick as the 

 second. The eleventh is double the length of the tenth and 

 for one-third thicker, not very acutely pointed. Prothorax 

 wider than long, widest at middle where it exceeds the head, 

 convex, the lateral fove^ not in full view^ from above. Elytra 

 evenly arched, the discal lines slightly convergent near the 

 base; the sutural lines are parallel, the shoulders low, not 

 prominent. Sides evenly arcuate, posterior margin of each 

 elytron arcuate in the middle, sinuate at the sides. Sutural 

 length and humeral wddth equal, width at tips less than one- 

 third greater. Abdomen with the segment one-fourth as long 

 as wide, the carinas including one-fourth of the dorsal surface 

 and not very conspicuous. 6 basal abdominal segment pro- 

 duced in one triangular lobe, the sides of the triangle from 

 the posterior lateral angle converging in straight lines toward 

 the blunt pointed middle. Disk with a slight depression in 

 the lateral quarters. The second segment is slightly swollen, 

 perpendicular with the rest of the segments and impressed at 

 the base, just beneath the lobe of the first segment with the 

 usual fovea. Legs slender, posterior 6 tibi« arcuate. 



Habitat. Atlantic States. 



B. perforata, Brcndel. Black, impunctate, polished, pubes- 



