DUEHAM DIPTERA. 395 



LVIII. 



667- Stenopteryx. 



2877. Stenopteryx hirundinis, L. 

 Bishop Auckland, 2 ; Darlington, 1, on young 

 swallows. 



9 (8). Ocelli absent. 



668. Oxypterum, Leach (2878. pallidum, Leach) 

 (Parasitic on swallows). 

 10 (1). Wings entirely wanting. 



670. Melophagus, Ltr. 



2881. Melophagus ovinus, L. 

 Everywhere; too common on sheep. 



Family LIX.— BRAULID^E. 



671. Braula, Nitz. (2882. ccBca, Nitz.) 

 Parasitic on bees. 



Family LX.— NYCTERIBID^E. 



672. Nycteribia, Ltr. 

 Parasitic on bats. 



1 (2). Tibiae club-shaped, much narrower in the middle than 



the whole length. (2884. hermanni, Leach) 



(On the two horseshoe bats, &c.) 



2 (1). Tibiae shovel-shaped, nearly as broad as long in the 



middle. (2883. latreillii, Leach) 



(Commonest on the Particoloured Bat ( Vespertilio murinus), 

 also on the Lesser Horseshoe and Daubenton's). 



