The PsELAPHIDyE OF NORTH AMERICA. 279 



Head and elytra as in B. abdominal i$^ the impressions 

 deeper. Prothorax widest slightly behind the middle and 

 more convex toward the base, the lateral foveas not in full 

 view from above. AntcnncB not quite half as long as the 

 entire body, the fifth joint a Httle longer. Abdomen slightly 

 divergent to the tip of the tirst segment, the obsolete carin^e 

 including one-half the segmental width in the female. In the 

 male the two basal segments are sculptured, the first much 

 depressed at the lateral basal angles, posterior margin pro- 

 duced, emarginate at the sides, broadly gouged in the middle, 

 leaving each side a blunt-pointed lobe. In the middle of the 

 surface is an X-shaped elevation. The second segment is 

 concave from side to side at the bas'e, and in the middle is a 

 large, deep, punctured fovea; the posterior margin is produced 

 backward, broadly emarginate laterally, concave in the 

 middle, leaving an oblong longitudinal elevation on each side. 

 The third segment is of much the same general outlines as 

 the second, but without visible sculpture. Legs and under 

 surface not exhibiting any peculiarities. This insect repre- 

 sents the southern form of B. abdominalis. 



Habitat. From the Gulf to the Ohio river. 



B. INTERMEDIA, Brcndcl. Uniform brownish-red, impunc- 

 tate, pruinose, more shining than B. abdominalis. Length, 

 1.9 mm. Plate VIII., Fig. 52. 



Head and prothorax smaller, more deeply impressed, the 

 occipital fovea large, open toward the eyes, the latter more 

 convex, lateral fovea not in full view from above. RIytra 

 more convex, the suture two-thirds, the shoulder-width one- 

 half, and the width at tip not quite twice greater than the 

 length of the prothorax. Abdomen with the margins of the 

 basal segments parallel, carinje including rather less than one- 

 third of the segmental width. 5 with the basal dorsal seg- 

 ment obliquely oblong-ovoidal, impressed from the anterior 

 external angle to the posterior middle third of the segment, 

 the impression limited inside by an obliquely arcuate ridge, 

 which terminates posteriorly in a declivous sharp edge. The 



