ORDER I. COLEOPTERA. 



65 



three and four-jointed; a minute and concealed additional 

 joint existing in both cases. 



The form and clothing of the joints of the tarsi are 

 to be noted in the examination of beetles. 



The antennas Fig. 31. 



are next to be ob- 

 served. Some are 

 slender and taper- 

 ing, or thread- 

 like, (filiform, fig. 

 31, 1) ; others 

 thickened to\vards 

 the free end, and 

 club-shaped (cla- 

 vate) ; or knob- 

 bed (capitate, 2). 

 In some the last 

 joints are flat and 

 leaf-like (lamel- 

 late), attached to- 

 gether at one end 

 and opening and 

 closing like a fan 

 (fig. 3 1,5); while in 

 others these joints 

 are thick, and much 

 larger on one side 

 than on the other, forming a knob or club with deep fis- 

 sures (fissate, 6). 



In some the antennas are slender and toothed more 

 or less deeply, like a saw (serrate, 7), or a comb (pecti- 

 nate, 8) ; and in others the joints present the appear- 

 ance of a string of beads (moniliform) . When the knob 



1. Filiform. 



2. Capitate. 



3. Perfoliate club. 



4. Geniculate. 



5. Lamellate. 



6. Fissateclub. 



7. Serrate. 



8. Pectinate. 



