Memoirs on the coleoptera

BYRRHID.E n
Length 4.25 mm.; [width 2.4 mm.]. Escanaba (Lake Superior).
[Pedilophorus subcanus Lee. Pr. Am. Phil. Soc., 1878, p. 609].
subcanus Lee.
The erect black bristles are very stiff but not squamiform as
they are in the Syncalypta section of the Byrrhini ; they are short
but numerous and somewhat conspicuous. The gray hairs are
scattered more especially toward the sides and apex, but not con-
densed into spots, the hairs forming the condensed streaks and
spots alluded to above, being formed exclusively of decumbent black
hairs. The abdomen is sculptured differently from any Morychus
known to me; there the punctures are somewhat coarse, very dense
and subconfluent; here they are notably fine and deep; but, though
very close, they are well defined and isolated among themselves
and very evenly distributed throughout. The second segment is
longer than either the third or fourth.
Listemus n. gen.
In this genus the hind femora and tibiae are securely sheltered
in repose within very deep fossae, extending fully to and for some
distance along the hind margin of the first ventral segment, the
tarsi being free. This is a radical taxonomic feature separating
Listemus and Eusomalia from Morychus or any of the genera allied
thereto. In addition, in Listemus the abdomen becomes very
coarsely cribrate, but the sutures are arcuate as in Morychus, the
last two coarse, the first two fine, which constitutes another struc-
tural difference between the two genera. The tarsi are lobed be-
neath throughout and strongly
present the three following species:
so as a rule. I have before me at
Condensed areas of elytral punctuation very feebly defined and but
slightly differentiated. Form elongate-oval, very convex, gradually
and rather narrowly rounded behind when compared with Morychus,
shining, bright aeneous in lustre, with feeble greenish tinge, deep
black throughout beneath, the tarsi alone paler, piceo-testaceous;
vestiture above consisting of rather long, sparse and decumbent
pale fulvescent hairs, without intermixed erect hairs, on the under
surface short, sparse, more cinereous but inconspicuous; head evenly
convex, rather strongly, closely punctate, becoming almost impunctate
centrally; prothorax two and one-half times as wide as
long, strongly narrowed from base to apex, the sides nearly straight,
the apical angles produced and very acute; punctures fine, sparse
and but slightly uneven in distribution, rather coarse but still widely