172 COLEOPTERA OF NORTH AMERICA. 



the liiiul coxal plates are suddenly dilated internally; the tibiiE 

 are cylindrical, with long slender spurs; the tarsi are rather 

 short, the second joint slightly, the third broadly lobed beneath, 

 the fourth small, the fifth a little longer than the third, with the 

 claws broadly toothed or appendiculate. Fifth ventral segment 

 emarginate. 



Tribe II.— ErCIXETliVI. 



Eucinetus, a genus of wide distribution, composes this tribe; 

 the mouth is prolonged ; the head deflexed, without distinct 

 clj])eal suture; the prostcrnum is exceedingly short in front o*f 

 the coxa?, which are long and conical; the middle coxce are large 

 and flat; the posterior ones are dilated into immense oblique 

 plates, concealing the hind legs in repose; the metasternum is 

 consequently short, and riiomboidal ; the tibial spurs are distinct, 

 the tarsi somewhat elongated, filiform, joints 1-4 decreasing in 

 length ; claws simple. Ventral segments six. The body is 

 elongate-oval, convex, brown or black, pubescent. 



The internal lobe of the maxillee is armed with a terminal hook. 



Tribe III.— EIJBRIIIVI. 



Head deflexed, front narrow, contracted by the insertion of the 

 antennaj and prolonged into a slight beak. Mandibles entirely 

 con(;ealed. Maxillary palpi slender, elongated. Anterior coxaj 

 transverse, without trochantin, separated by the prosternum and 

 not more prominent than it except in Acneus. Middle coxae 

 more widely separated than the anterior, the mesosternum being 

 more or less protuberant, either truncate or emarginate. The 

 posterior coxas are scarcely dilated internally. Tibite with minute 

 terminal spurs, in two genera. Tarsi slender, slightly dilated in 

 Dicranopselaphus, claws variable. 



The species composing this ti'ibe are of oval moderately robust 

 form, with teguments of firmer consistence than in Helodes or 

 Cyphon. Two of the genera agree in having the terminal 

 joint of the palpi simple, without articulated appendages. In 

 Eubria the last joint of both palpi is furnished with three short 

 spines and in Dicranopselaphus with two. 



The ungues of the genera of this tribe difl'cr in the sexes. In 

 the males the anterior claw of each tarsus is bifid at tip, the 

 posterior simple; all have a broad tooth at base. In the females 



