Queen blow fly 

 Phormia regina Meig. 



i Anterior extremity of first stage maggot, showing the cephalo- 

 pharyngeal skeleton and the transverse bands of chitinous 

 points (x ioo) 



2 Anterior portion of second stage maggot, showing cephalo- 



pharyngeal skeleton (x ioo) 



3 Cephalo-pharyngeal skeleton of third stage maggot (x 66) 



[234] 



