PLATE XX. 



FAMILY XXX. HIPPOBOSCHm 



GENUS 1. Hippobosca. Fig. 1. Hippobosca equina. 1 a, head, 

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

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

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



GENUS 2. Ornithobia. Fig. 2. OrnitJiobia pallida (from Meigen). 



GENUS 3. Ornithomyia. Fig. 3. OrnitJwmyia amcularia. 3 a, an- 

 tenna ; 3 b, ungues. 



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



GENUS 5. Stenopteryx. Fig. 5. Stenopteryx (Oxypterum) pallidum. 

 5 0, antenna of Stenopteryx Hirundinis ; 5 b, wing of ditto. 



GENUS 6. Melophagus. Fig. 6. Melophagus ovinus. 6 a, head, 

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



FAMILY XXXI. NYCTEEIBIID^. 



GENUS 1. Nycteribia. Fig. 7. Nycteribia Hermanni. 7 , the 

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

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

 domen, seen sideways ; 7 d, head, seen as when porrected, from 

 the side; 7 je, abdomen of Nycteribia Latreillii, seen from above ; 

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



J. 0. W. 



