﻿56 



BtJLLETIN' 1369, IJ. S. DEPARTMENT OF AGEICULTUEE 



prior to the molt their details of structure are well defined beneath 

 the skin of the fourth stage (fig. Q, g). As in the preceding molt, 

 the rupture in the integument seems to be irregular and does not 



Fig. 26. — Under side of hide just removed, showing cysts, some of which are cut open 



to expose cattle grubs 



always occur in the same place. The exuvium remains in the cysts 

 and can often be removed by continued pressure after the fifth-stage 

 grub has been forced out. 



