. 43 



ocelli ; arista nude ; legs long and extended. Claws 

 bidentate. 



H. equini. Runs rapidly over the body ; is the 

 [New] forest fly of England. 



H. camelina. Attacks camels in Egypt. 



H. rufipes. Transmits T. theileri (?). 



Fig. 128 



(b) Genus Melophagus. Wings extremely minute. 

 Eyes small. No arista on antennae. Claws bidentate. 



M. ovis is the sheep ' tick.' Four millimetres long. 



(c) Genus Ornithomyia. Wings large. Four 

 millimetres long. 



O. aricularia. Occurs on birds. 



(d) Genus LipQptena, e.g., L. cervi on the red deer. 



(e) Genus Stenopteryx, e.g., S. hirundinis of the 

 swallow. 



2. Nycteribiidae. 



Found on bats. They have no wings. 



