4°3 
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. theil'eri (?). 
»f Hi^|>olosca Tu^i"|5es. 
Fig. 128 
(b) Genus Melophagus .—-Wings extremely minute. 
Eyes small. No arista on antennae. Claws bidentate. 
M. ovis is the sheep 4 tick. 5 Four millimetres long. 
(e) Genus Ornithomyia .—-Wings large. Four 
millimetres long. 
0 . aricularia .—Occurs on birds. 
(d) Genus Lifoptena , 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. 
