30 NATURAL HISTORY BULLETIN 



B. BOWDiTCHi n. sp. (Plate YII, Figs. 6, 13.) Form elongate, similar 

 to that of B. exhmnatus from these shales. Head moderately large, 

 sculpture indistinct but apparently of moderate sized circular closely placed 

 shallow punctures. Eyes rather small. Antenna more slender than usual 

 in this genus, the apical joints wanting, the median ones about equal in 

 length and breadth, subserrate. Prothorax about three-fifths as long as 

 wide, broadest behind the middle, tapering with nearly straight sides to the 

 apex which is much narrower than the base, all the angles rounded or in- 

 distinct, surface with shallow but distinct close-set circular punctures which 

 are more crowded at the sides, no sign of median groove or carina. Elytra 

 long, about three times the length of the prothorax, finely striato-punctate, 

 the punctures elliptical, moderately strong, wider than the striae, those of 

 each series separated by less than their own long diameters, as a rule, though 

 in places they are more widely spaced. Both striaa and punctures are 

 stronger near the elytral bases, becoming so weak near the apices that I have 

 not been able to trace them with certainty in that region. Legs wanting. 

 Length, about 6.00 mm. 



Station number 17. One specimen collected by S. A. Rohwer. The type 

 is in the Museum of the University of Colorado. 



This is most like B. exhumatus but is distinguishable from it 

 by the more slender antennae and the stronger punctuation. 

 Named for Fred C. Bowditeh of Brookline, ^Massachusetts. 



B. FLORissANTENSis n. sp. (Plate VII, Fig. 3.) Form only moderately 

 elongate, less so than in B. howditchi, from which species it is separated 

 chiefly by the body proportions. Head finely sculptured with small circular 

 shallow closely placed punctures. Eye large. Antenna rather long and 

 slender, similar to B. howditchi. Prothorax with shallow but distinct small 

 circular punctures (but considerably larger than those of the head) mod- 

 erately closely placed on the disk, more crowded at the sides and much 

 sparser on the prothoracic flanks. Elytra distinctly less than three times 

 the length of the prothorax, surface with fine sharp strife with elongate 

 rather strong punctures separated in each series by a little less than their 

 own long diameters. The striae and punctures become weaker towards the 

 tip, as in B. iotrditchi, so that I have not attempted to figure their termina- 

 tions. Hind femora large and swollen, tibiae strongly arcuate. Length, 

 4.00 mm. 



Station number 13. One paired specimen, in side view, collected by S. 

 A. Rohwer. The type is in the Museum of the University of Colorado. 



Resembles B. howditchi very closely and I only separate it on 

 account of the relatively much shorter elytra, although the 

 punctuation, especially on the prothorax, is distinctly stronger. 

 The femoral region is not sufficiently well defined to enable me 

 to be sure of the absence of a tooth, but none can be made out. 



