ANTENNA. 



241 



slender tooth, generally arising from the base or ex- 

 tremity of each, thus resembling a comb (fig. 78). 

 Bijjectinated, when each joint produces two long teeth, or 



filaments. 

 Flabellated, when the branches are very long, and flattened 



hke the rays of a fan (fig. 78, beneath). 

 Ramose, when several of the joints throw out branches 



(fig. 79). 

 Furcate, when the antennae are di\4ded into two branches 



like a fork (fig. 80). 

 Geniculated, when they are bent at an angle, generally at 



the extremity of the long basal joint, like an elbow 



(fig. 81). 

 Clavate, when they gradually thicken to the tip, hke a club 



(fig. 82). 

 Capitate, when they are terminated by a knob-like mass 



or head. 



Perfoliate, when the terminal joints of the club are not 



closely applied to each other. 

 Lamelliform, when they are terminated by a club greatly 



produced on one side, the joints of which form plates 



applied against each other (fig. 83). 

 Fissile, when they are terminated by a cleft knob. 



Y 



