422 



COLEOPTERA. 



joints are triangular and compressed, giving thereby a serrate 

 outline to the inner edge; or clavate, as in the iSilphidue^ 



Fig. 347. 



where the enlarged terminal joints give a rounded club-shaped 

 termination ; lamellate, when the terminal joints are prolonged 



internally, forming broad leaf-like expansions, as in the Sca- 

 rab e idee. ^ Avhile the geniculate antenna is produced when 



riG. 347. Different forms of antennte : 1, sen-ate; 2, pectinate; 3, capitate (and 

 also geniculate); 4, o, 6, 7, clavate; 8, 9, lamellate; 10, serrate (Dorcatonia); 11, ir- 

 regular (Gyrinus); 12, two-jointed antenna of Adranes ca;cus. 



Tig. 348. 1, bipectinate: 2, flabellate antenna;; 3, maxillw of Bembidium; 4. of 

 Hydrophilus; 5, of Pselaphns; 6, maxillaiy palpus of Cteuistes; 7, of Tmesipho- 

 rus; 8, of Tychus. — i^?-ow Leconte. 



