274 Natural History Bulletin. 



in the male and not more convex outside. Prothorax with the 

 basal sulcus sharply defined, the median fovea small. Elytra 

 widest near the tip, which is one-fourth wider than the high 

 prominent shoulders; posterior margins straight, fringed with 

 yellow hair, discal lines more deeply impressed in the darker 

 specimens. Abdominal carinas short, more than one-fourth 

 of the segmental width apart. Trochanters not spinous, 

 anterior tibiae emarginate inside from the upper third to the 

 tarsus. Variable in color and size, also in the antennse. 



a. VARicORNis. Last antennal vellovv. Canada. 



h. truxcaticornis. Tenth joint flattened on the inside, 

 convex outside, last joint with a recumbent tooth. Iowa, 



This species has a wide range. It occurs over the territory 

 east of the Mississippi and and as far west as Idaho. 



B. BRENDELii, Honi. Black, polished, impunctate, legs, 

 antennas and palpi brown, elytra varying to piceous-red. 

 Length, 1.7 to 1.8 mm. Plate VIII., Fig. 47. 



Head with the frontal margin nearly straight, less concave 

 between the frontal tubercles, the foveas larger. Anteiince^ 

 6 with the first joint obconical, not half as long as the frontal 

 margin, flattened above, second smaller, oval. Third and 

 fourth smaller, obconical, equal, fifth, sixth, seventh and 

 eighth, equal in length and thickness, conspicuously larger 

 than the preceding, subglobular, with darker pubescence; 

 ninth and tenth oblique-transverse outside, rounded inside, 

 pointed forward, equal and connate with one another and 

 with the last joint which is obliquelv ovate-acuminate. These 

 last three joints have a velvety black, densel}' pubescent club, 

 three times as thick as the eighth, and as long as the five pre- 

 ceding joints together. ? with the third to eighth joints 

 equal, cylindrical, the last three forming a slightly smaller 

 club with the joints not oblique, ninth and tenth trapezoidal, 

 the pubescence not so dense as in the male. Elytra and 

 abdomen as in B. conjuncta. I anterior tibiae toothed on the 

 upper third, anterior trochanters armed with a slender spine. 



Habitat. Region of the Great Lakes. 



