Xiv INTRODUCTION. 



forming- a serrate club; the form varies by insensible gradations 

 (as in the Clerida;), from the regularly serrate form and the very 

 flattened serrate club, to the small and more compact club of 

 Corynetes ; whereby we pass to the next type. Other moditica- 

 tions of the serrate type are: — 



a. The joints are sliort, and very much prolonged anteriorly, 

 giving the pectinate, or when on both sides the bipectinale form; 

 when these prolongations are very long compared with the an- 

 tennae, the jiabellate form results, and when long, slender, and 

 flexible, plumose. 



h. Rarely (as in Ptilodactyla) the branches in place of being an 

 integral portion of the joint are articulated appendages ; in this 

 case the joints are called apjjendicalate. 



/p=^ 



/-" ^ 



Clavate A.\tenn;e: 1. Trogosita; 2. Catoptriclius ; 3. Colon; 4. Bryaxis ; 5. Anog- 

 dus ; 6. Liodes ; 7. Epierus ; S. Phyiuaphora ; 9. Heterocerus ; 10. Adraues. Capillary 

 AND Verticillate: 11. Dasycerus. Moniliform: 12. Rhyssodes. Lamellate: 13. 

 Lucauus ; 14. Bolbocerus ; 15. Lachnosterua. Irregular: 16. Diueutus. 



3. Clavate, where the outer joints are more or less enlarged, 

 I)ut not triangular or leaf-like. This is the most common form 

 of ahtennje, and its modifications connect insensibly with all the 

 other types; names are therefore necessary for the purpose of 

 more definite description. The principal forms are as follows: — 



a. Moniliforiin or granose, when the joints, not difi'ering greatly 

 in size, are rounded, resembling a string of beads; this leads to 

 the filiform type. 



b. Clavate, where the outer joints are gradually larger, forming 

 an elons-ate club. 



