458 THE BLOWFLIES OF NortH AMERICA 
PLATE 43 
Calliphora livida Hall 
Larva, third instar 
Posterior spiracle. 
Cephaloskeleton. 
Calliphora terrae-novae Macquart 
Larva, third instar 
tb 
C. Posterior spiracle. 
D. Cephaloskeleton. 
