200 BRITISH BEETLES. 



feet insect appears in both to have only four joints to 

 the tarsi, yet in the former there are five, the basal joint 

 being very small; whilst in the latter the four th joint is 

 obsolete, or confused in the middle of the lobes of the 

 third : the parts of the mouth, moreover, are of a much 

 higher development in Bostrichus and its allies. As if 

 to increase the confusion, cetain other authors, while 

 separating these two groups widely, apply the name of 

 the Bostrichidce to the present family. 



