CLAVICOKNIA. 3^1 



H I>. Antennae not elbowed. 



a a. Tibiae with a ring of closely-placed s])ines 

 at apex ; posterior coxae contiguous. 



Club of antennae oblong, three-jointed ; maxillae with 

 two lobes ; elytra convex, covering whole of abdomen, latter 

 with five ventral segments, all free ; anterior coxae globular, 

 posterior pair placed close together ; tarsi five-jointed, first 

 three joints dilated, thickly covered with hairs beneath, 

 fourth joint very small. rhalacridae. 



h b. Tibiae without ring of spines at apex ; 

 posterior coxae generally placed apart. 



A a. Anterior coxae cylindrical. 



A 1. Fourth tarsal joint smaller than 

 second and third. 



Club of antennae compact, two or three-jointed ; elytra 

 generally truncate behind, sometimes considerably abbre- 

 viated ; abdomen with five ventral segments, all free ; 

 posterior coxae placed more or less apart ; tarsi five-jointed, 

 either first and fourth or only fourth joint (usually latter) 

 small, posterior tarsi of male rarely four-jointed. 



Nitidulidae. 



JB 1, Fourth tarsal joint not smaller than 



second and third. 



Maxillae with two lobes ; elytra covering abdomen, 



latter with five ventral segments, all free ; tarsi five-jointed, 



first joint small, last one very long, with a slender lobe, 



bearing two bristles at apex, between claws. 



Troyositidae. 



I* b. Anterior coxae globular. 



A 1, Anterior tarsi with same number of 

 joints in both sexes. 

 a 1» Tarsi with five or four joints. 



A 2. First three or four abdominal 

 segments fixed together. 



Antennae with ten or eleven joints, variously formed ; 

 abdomen with five ventral segments ; tarsi with four simple 

 joints. Colydiidae. 



li 2. Abdomen with five ventral seg- 

 ments, all free. 



