PLATE XX. 



Family XXX. HIPPOBOSCID^. 



Genus 1. Hippobosca. Fig. 1. Hippobosca equina. 1 a, bead, 

 seen in front ; 1 b, antenna ; 1 c, front of head, sideways ; 1 d, 

 labrum, with the lingua and hibium, and the muscular base by 

 which they are protruded ; 1 e, one of the halteres. 



Genus 2. Ornithobia. Fig. 2. Ornitliohia imlllda (from Meigeu). 



Genus 3. Omithomyia. Fig. 3. Oruithomyia avicularia. 3 a, an- 

 tenna ; -3 ^, ungues. 



Genus 4. Hsemobora. Fig. 4. Hamobora pallipes (from Curtis). 



Genus 5. Steuoptersrx. Yig.^. Stenoptcnjx {Oxypterum) pallidum. 

 5 o, antenna of Stenopteryx Hiraudiuis ; 5 b, wing of ditto. 



Genus 6. Melopbagus. Fig. 6. Melopluujus ovinus. 6 a, head, 

 seen from beneath; 6 b, antenna (from Curtis). 



Family XXXI. NYCTERIBIIDJE. 



Genus 1. Nycteribia. Fig. 7. Nyderibia Hermamii. 7 a, the 

 same, walking, with the head (Jt) thrown back in the ordinary 

 position ; 7 b, thorax and abdomen, seen from beneath ; 7 c, ab- 

 . donicn, seen sideways ; 7 d, head, seen as when porrected, from 

 the side ; 7 e, abdomen of Nyderibia Latreillii, seen from above ; 

 7 /, thorax and abdomen of ditto, seen from beneath. 



J. O. W. 



