418 Tue BLowF.uirts or NortH AMERICA 
PLATE 23 
Francilia alaskensis Shannon 
Genital segments of male 
Left lateral view of composite. 
Posterior portion of abdomen. 
Forceps, rear view. 
Bufolucilia elongata (Shannon) 
Genital segments of male. Forceps, lateral view. 
Bufolucilia siluarum (Meigen) 
Genital segments of male 
Left lateral view of composite. 
Fifth sternite. 
Lucilia illustris (Meigen) 
Genital segments of male 
Left lateral view of eomposite. 
Fifth sternite. 
Sa 
ions) 
Aa 
