DURHAM DIPTEEA. 35 



141 (1) (52|). Body of a horny or leathery nature, head sunk 



into a hollow in the thorax (VI. 35). No proper 

 proboscis or palpi. Claws very large (VI. 36). 

 Perfect insect parasitic on warm blooded 

 animals. 



EPROBOSCIDEA. 



142 (145). Head fairly large, inserted in a hollow in the thorax; 



sometimes without wings. Parasitic on birds, 

 mammalia, and bees. 



143 (144). Eyes, ocelli, scutellum, halteres, and wings all 



absent. Last tarsal joint combed with bristles. 



Braulim: (LIX.) 

 Only one species (2882. Brciitla caeca, Nitz.), 

 found in beehives. 



144 (143). Eyes and scutellum present, last tarsal joint with 



well developed claws. Hippoboscid^e (LVIII.) 



145 (142). Head small, when at rest thrown back upon the 



dorsum. Always wingless. Parasitic on bats. 



Nycteribidje (LX.) 



