450 



TEXT-BOOK OF ENTOMOLOGY 



composed of large granulated nuclei ; and within are the more trans- 

 parent endotracheal cells ; at t' are fragments of the moulted taenidia. 

 The new taenidia are in process of development at t ; at base they 



FIG. 414. Teenidia aud internal hairs of Zaithu. After Stokes. 



