412 Trnz BLOWFLIES oF NortH AMERICA 
PLATE 20 
Boreéllus atriceps (Zetterstedt) 
Genital segments of male 
Left lateral view of composite. 
Aedeagus, rear view. 
Foreeps and second genital segment, rear view. 
Fifth sternite. 
Protophormia terrae-novae (Robineau-Desvoidy) 
Genital segments of male 
Left lateral view of composite. 
Foreeps, rear view. 
Faw p> 
