NORTH AMERICAN COLEOPTERA. 33 



broailor than long, tenth nearly twice as wide as long, one-half wider tlian 

 the nintii, eleventh nearly as long as the four preceding joints together, twice 

 as wide as the ninth, slightly constricted at the base, wliich is transversely 

 truncate, obliquely conoidal, feebly acnminate at the tip ; labrum twice as 

 wide as long, transversely and very feebly emargiuate at apex, rectangular. 

 Prothorax much wider than long, suddenly and strongly swollen at tlie 

 middle ; sides rather strongly convergent posteriorly and very feebly sinuate ; 

 disk very convex, not punctate, polished ; lateral foveae well developed, 

 impressed, circular, slightly behind the middle, spongy at the bottom ; 

 medial fovea in the form of a very minute, deeply impressed puncture, cir- 

 cular, very near the basal line, bottom not spongy. Elytra at base slightly 

 narrower than the prothorax; sides strongly divergent posteriorly, three - 

 fourths longer than the width at base, and rather strongly arcuate ; together 

 transversely truncate behind ; apical angles very slightly produced poste- 

 riorly, disk very convex, highly polished ; two longitudinal striae upon each 

 elytron are very distinct. Dorsal segments strongly margined ; surface highly 

 polished, first segment having two short, minute, elevated carinae, which 

 diverge from the extremities of a transverse ciliated patch, nest to the elytra ; 

 first segment as long as the next two together. Last ventral segment having 

 a large, transversely oval impression, distinctly defined, though rather 

 shallow, last dorsal emarginate at tip, emargination evenly rounded, and 

 about three times as wide as deep. Last joint of maxillary palpi nearly as 

 long as the first three together, robust, and finely acuminate. First joint 

 of posterior tarsi rather short, second but slightly longer than the third. 

 General color bright rufous, more or less clouded with castaneous, abdomen 

 much darker, nearly piceous-black. Length 1.4 mm. 



Detroit, Michigan (Schwarz). 



This fine species appears to belong near ruhicunda. The last 

 ventral segment is very broadly emarginate in the latter, and is 

 narrowly and rather strongl}^ so in the present species. It should, 

 perhaps, come just before triyona in Dr. LeConte's latest tabular 

 arrangement of this genus. 



B. iiiopia n. s^j. — Form very robust. Pubescence very short, evenly 

 distributed, recumbent, pale piceo-cinereous, slightly more sparse on the pro- 

 thorax and longer on the abdomen. Head as broad across the eyes as long ; 

 inter-antennal carina rather distinct, angulated anteriorly ; immediately 

 behind this there is a very large, transversely oval, somewhat strong and 

 distinctly defined impression ; on a line through tlie middle of the eyes, there 

 are two distinct, rather widely separated, circular, impressed foveae ; inter- 

 ocular surface polished and impunctate ; antennae one-half as long as the 

 body, basal joint very slightly larger than the second, third distinctly longer, 

 much more slender, equal in length to the fifth, fourth distinctly shorter, 

 fourth, sixth, and seventh joints equal, eighth smallest, slightly longer than 

 wide, cylindrical, ninth slightly thicker and more clavate than the eighth, 

 tenth nearly twice as wide as the ninth, as broad as long, eleventh as long 

 as the three i3receding joints together, nearly twice as long as wide, obliquely 

 Published August, 1884. 3 



