460 THE BLOWFLIES OF NortH AMERICA 
PLATE 44 
Calliphora vicina Robineau-Desvoidy 
Larva 
Anal area, third instar. 
Cephalic segments, first instar. 
Cephaloskeleton, first instar. 
Cephaloskeleton, second instar. 
Cephaloskeleton. third instar. 
Posterior spiracle, third instar. 
Calliphora vomitoria (Linnaeus) 
Larva. third instar 
BeOS 
Posterior spiracle. 
Cephaloskeleton. 
aise 
