COLYDIIDES. 453 



Antennae inserted below side margin of forehead. Last 

 joint of maxillary palpi hatcliet-sbaped ; lalirum hidden. 

 Thorax usually with three furrows on disc ; elytra rib1)e(l, 

 interstices punctured in rows ; first three tarsal joints gra- 

 dually diminishing in length. Colydium, Fab. 



I), Antennae with eleven joints, club two-jointed. 



Base of antennae free. Last joint of maxillary palpi 

 gradually narrowed, with apex truncate ; ligula bilobed. 

 First three tarsal joints equally short. Teredus, Dej. 



c. Antennae apparently with ten joints, the tenth 

 forming a large solid knob and shewing traces of the 

 eleventh at apex. 



Last joint of maxillary palpi much longer than the rest 

 together, oblong oval, apex truncate ; ligula bilobed. First 

 three tarsal joints equally short. Oxylaemus, Er. 



2?. Eyes absent. 



Antennae with eleven joints, club three-jointed. Last 

 joint of maxillary palpi oblong oval, with apex truncate. 



Aglenus, Er. 



CoJydium. 



Very narrow. Black, shiny ; antennae and legs brown- 

 red. Apex of elytra jointly rounded. L. 2 — 3 1. Very 

 rare. C clongatuni, Fab. 



Teredus, 



Elongate, cylindrical. Black, shiny ; antennae and legs 

 red. Thorax nearly double as long as broad, closely and 

 finely punctured ; elytra with very fine punctured striae, 

 interstices also finely punctured in rows. L. 2 1. Very rare. 



T. iiitidus, Fab. 



Oxylaemus, 



A, Thorax rather closely punctured, with four impressions 

 at base, the outer ones reaching scarcely one-third the 

 length of thorax. 



Elongate, cylindrical. Eed-brown, shiny. Each elytron 

 with eight punctured striae ; the punctures of seventh very 

 fine, of the rest large and deep. L. 1| 1. Rare. 



0. cylindriciis, Pauz. 



