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 so as a rule. I have before me at 

 present the three following species: 



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 im- 

 punctate 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 



