Memoirs on the coleoptera

BYRRHID/E 2 1
Two transverse elytral lines inclosing a transversely crescentiform area. .
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; prothorax
long, fully one-half as long as the basal width, the strongly
converging sides nearly straight; punctures fine and close but distinct,
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; metasternum
coarsely, very densely punctato-rugose. Length Q.o mm.;
width 5.4 mm. Lake Superior (Whitefish Point) .
.brunnescens
5
n. sp.
Abdominal asperities not so close-set and very feeble, the general sculpture
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 transverse,
much less than half as long as the basal width, the strongly converging
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