478 COLEOPTERA OF NORTH AMERICA. 



The generic and group characters are combined in the above 

 description. 



Tribe VI.— TRACH01>Ii\I. 



The genus Trachodes, which occurs in Europe, Asia, and 

 Alaska, differs sufficiently from all others in our fauna to merit 

 being placed in a separate tribe. Lacordaire classed it with the 

 Molytini, which however seems an unnatural grouping of genera 

 agreeing only in convex body, short metasternnm, and absence 

 of wings. The beak is rather slender, as long as the prothoi'ax ; 

 the antennse are inserted a little before the middle (9), or one- 

 third from the end (%), rather slender, the scape reaching the 

 inferior margin of the eyes, which are nearly round, coarsely 

 granulated, and somewhat removed from the prothorax ; the 

 funiculus is T-jointed, first joint elongate and stout, second nearly 

 as long, but slender, 3-7 short, slightly increasing in thickness; 

 club rounded oval, about one-half longer than thick, annulated, 

 pubescent, tip rather pointed. Prothorax scarcely lobed, but 

 ciliate behind the eyes. Epimera of metathorax narrow, entirely 

 covered by the elytra; hind coxa3 rounded, widely separated, not 

 attaining the elytral margin. Ventral segments, first and second, 

 large, each as long as the metasternum, separated by a straight 

 suture which is deeply impressed at the sides; third and fourth 

 short, sutures straight; fifth as long as the two preceding united. 

 Legs rather long, thighs pedunculated, not toothed ; tibi^ slender, 

 strongly hooked at tip; tarsi rather long, third joint wider, bi- 

 lobed, last joint elongate, claws simple, slender, separate. Body 

 rough with short erect bristles. 



Tliree species of Trachodes are found from Alaska to Van- 

 couver Island. 



Tiilje VII.— OTIDOCEPHALINI. 



In all the preceding tribes the tarsal claws are simple, usually 

 separate and divergent, rarely connate; in this, as in several of 

 those which follow, they are toothed; the tooth, however, is 

 broad and not very prominent, giving the form termed appendi- 

 culate. The species are easily known from those of other tribes 

 by the prothorax being narrowed at base, and somewhat pedun- 

 culate. Several of them are shining black and glabrous, so that 

 they resemble in appearance ants. 



