ELEMENTARY TERMS. 83 



TARSUS,* the ancle or foot of an insect, generally long 



and many-jointed. 

 CAUDAL FINS, on the end of fishes tails, 



IX. RELATING TO THE TAIL. 



PREHENSILE, formed for coiling around, and holding 

 by, substances. 



RUMP, the cordate process supporting the tail of a bird* 



TAIL-FEATHERS, the large feathers of the tail, general- 

 ly 12, sometimes 10, 18, 20, 24. 



EXPANSILE, capable of being spread. 



TAIL-COVERTS, the clump of feathers next above the 

 rump. 



UiioPTGiAL, (or hypochondriac,) several long feathers 

 above on each side the tail, differing in form from the 

 others. 



X. RELATING TO THE HORNS, ANTEN- 

 NAE, &c. 



ANTENNJB, the horns or jointed processes on the heads 

 of insects, generally forward of the eyes. They are 

 short, when riot so long as the body ; long, when lon- 

 ger ; moderate, when about equal. 



SETACEOUS ANTENNA, shaped like a bristle, tapering 

 from base to point. 



FUSIFORM, spindle-form, being largest near the middle 

 and tapering both ways. 



LAMINATED, consisting of several thin flat portions. 



FILIFORM, thread-form, of nearly equal size through its 

 whole length. 



CLAVATE, club-form, thickening at the end, sometimes 

 ending in a knob. 



* In numbering the joints, the last cylindric one is reckoned, leaving 

 nothing out of the number but minute claws at the very tip. 



