CLAVICOKNIA. 343 



coxae placed apart, first abdominal segment without raised 

 lines. Endomychidae. 



li 2. Tarsi simple. 



Antennae witli larger apical joints ; labial palpi often 

 apparently only two-jointed ; outer lobe of maxillae gene- 

 rally obsolete ; elytra covering abdomen, latter with five 

 ventral segments, the first much larger than the others ; 

 posterior coxae placed apart ; femora clubbed, tibiae slender. 



Lathridiidae. 



B 1, Anterior tarsi of male with three, 

 those of female with four joints. 



Antennae gradually thickened or with two or three 

 larger apical joints ; posterior coxae placed apart ; abdomen 

 with five nearly equal ventral segments, all free. 



Mycetopharjidae. 



II. Posterior coxae dilated ; tarsi with five joints. 



1. All abdominal segments free ; anterior coxae 

 conical, prominent. 



Antennae short, inserted on forehead, often placed when 

 at rest in grooves beneath thorax, club usually three- 

 jointed ; forehead (except in Dermestes) with a single 

 ocellum ; femora with a groove for reception of tibiae ; 

 posterior coxae approximated. Dermestidae. 



2, First three abdominal segments fixed together ; 

 anterior coxae cylindrical, enclosed. 



Antennae inserted beneath side margin of forehead, 

 placed when at rest beneath thorax, gradually thickened or 

 witli several larger apical joints ; forehead without ocellum ; 

 tibiae received by femora ; posterior coxae approximated. 



Byrrhidae. 



b. Presternum membranous. 



Antennae nine-jointed, club three-jointed ; under-side of 

 thorax with round depressions for reception of club of 

 antennae ; abdomen with five ventral segments, not freely 

 moveable ; anterior coxae conical, prominent, approximated, 

 hinder paks placed apart, tarsi four-jointed, simple. 



Georyssidae. 



JB. Antennae irregular or very fine and scarcely thickened 

 toward apex ; in latter case tarsal claws unusually large. 



