BYRRHID/E 2 1 



Two transverse elytral lines inclosing a transversely crescentiform area. . 5 



5 Pubescence of the pronotum short, closely decumbent and but slightly 

 variegated ; abdomen finely sculptured 6 



Pubescence of the pronotum longer or more variegated and more con- 

 spicuous 8 



6 Abdominal asperities rather close-set and notably strong though fine. 

 Oblong-oval, dark brown in color throughout above and beneath; 

 head very closely and finely chagrined posteriorly, rather coarsely 

 and loosely punctured anteriorly, the hairs short, the transverse 

 impressed line and widely separated ocelhe-like spots distinct; pro- 

 thorax long, fully one-half as long as the basal width, the strongly 

 converging sides nearly straight; punctures fine and close but dis- 

 tinct, still more minute and very close broadly along the median 

 line, the pubescence short, obscure fulvous, but feebly variegated 

 with silvery spots; scutellum densely clothed with brownish-black 

 hairs; elytra parallel, two-fifths longer than wide, obliquely rounding 

 at the sides in about posterior third, the apex not very broad and 

 transversely rounded; alternate intervals with elongate areas of 

 denser and more blackish-brown pubescence, the anterior broken 

 silvery band narrowly advanced and truncate at the suture; meta- 

 sternum coarsely, very densely punctato-rugose. Length Q.o mm.; 

 width 5.4 mm. Lake Superior (Whitefish Point) . .brunnescens n. sp. 



Abdominal asperities not so close-set and very feeble, the general sculp- 

 ture of that part much more inconspicuous than usual 7 



7 Body throughout black, the legs slightly picescent, the tarsi not paler; 

 body rather broadly oval; head sculptured nearly as in the preceding, 

 the transverse impressed line of the vertex very feeble, the widely 

 separated pale spots posterior thereto distinct; prothorax more trans- 

 verse, much less than half as long as the basal width, the strongly con- 

 verging sides somewhat arcuate basally; punctures more minute than 

 in the preceding, close-set but even throughout, not closer along the 

 middle: pubescence blackish, with a few silvery hairs at some points; 

 scutellum densely velvety-black; elytra nearly as in the preceding, 

 more elongate and more obtuse behind in the male than in the female, 

 the pubescence black, not wholly concealing the surface except in 

 the dense elongate patches of the alternate intervals, the silvery 

 bands as in the preceding; metasternum closely rugose, becoming 

 not densely punctate posteriorly toward the middle; mesosternal 

 emargination very broad and shallow. Length (c?) 8.3-8.8 mm., 

 (?) 7-5-8.0 mm.; width (o 71 ) 5.0-5.15 mm., (9) 4.6-5.0 mm. 

 New Jersey (Atlantic City). Indiana, Iowa and Lake Superior 

 (Bayfield). [B. amcricanus Lee., Agassiz, Lake Superior, 1850, 



p. 224] americanus Lee. 



A Nearly similar but larger, deep black throughout, the legs not at 

 all and the tarsi but slightly paler; head notably larger, similarly 

 sculptured, except that the transverse central line is shorter, 

 sharper and more arcuate, the pale points very small; prothorax 

 less transverse, almost similarly sculptured, the surface medially 

 becoming more opaque and with the punctures a little finer 



