PLATE IV. 



Fig. 1. Head of H?ematobia scrrata ; front ; after Riley and Howard. 

 2. Hyperderma bovis ; after Packard. 



4. Tongue of Stomoxys calcitrans ; after Meigen. 



5. Tongue of INIusca domestica ; after Packard, mp, palpi ; 



m, mandibles ; 1, labium. 

 (). Tongue of ^lusca domestica ; after Meigen. 



7. ]Macillaria hominivorax ; after Coquerel. 



8. Larva of Musca domestica ; after Packard. 



9. Pupa of ^lusca domestica ; after Packard. 

 10. Larva of Musca vomitoria ; from N;iture. 



IL Larva of Lucillia hominivorax ; after Packard. 



(186) 



