216 COLEOPTERA OF NORTH AMERICA. 



Tribe III.— RHADALIXI. 



A single species, lihadalus testaceus Lee, from California and 

 Arizona, by its strongly granulated eyes, and much elongated 

 maxillary palpi, with the last joint large and securiform is capa- 

 ble of being received as a distinct tribe. It is a transition form 

 from the present to the next family, from which it differs by the 

 joints of the tarsi not being lobed or spongy beneath, and by the 

 claws being provided with long membranous appendages which 

 are free, except at base. 



Fam. XLVI.-CLERIDAE. 



Mentum quadrate, moderate in size; ligula membranous, 

 or coriaceous, without paraglossae; labial palpi 3-jointed, 

 frequently very long and dilated. 



Maxillse exposed at the base, with two ciliate unarmed 

 lobes; palpi 4-jointed, with the last joint frequently securi- 

 form. 



Head prominent, eyes usually emarginate; epistoma dis- 

 tinct from the front, membranous or coriaceous anteriorly; 

 mandibles short, labrum distinct. 



Anteniii© inserted at the sides of the front, usually 11- 

 jointed, serrate, or pectinate, or with the outer joints enlarged 

 forming a serrate, or rarely a compact club. 



Prothorax with the side pieces not separate, though in one 

 tribe they are defined by a side margin; coxal cavities open 

 behind, sometimes round, sometimes transverse; prosternum 

 short, not prolonged. 



Mesosternura flat, side pieces extending to the coxae. 



Metasternum with long narrow side pieces; epimera 

 scarcely visible. 



Elytra entire, or nearly so, with the epipleuras distinct, 

 narrow. 



Abdomen with five or six free ventral segments. 



Anterior coxas' conical, prominent, contiguous, or very 

 slightly separated, trochantin sometimes distinct; middle 

 coxse rounded, not or very slightly prominent, and not con- 

 tiguous in many, but conical and prominent in Enopliini, 

 usually with distinct trochantin ; hind coxas transverse, not 

 prominent, covered by the thighs in repose. 



Legs slender, frequently long, trochanters on the internal 

 margin of the thighs; tibiae with the terminal spurs small 



