ORDER DIPTERA. lO/ 



perfect insect producing its young singly, and that not in the egg 

 state, as in most insects, but either in the pupa state, or as a 

 mature larva ready to become a pupa immediately. This tribe 

 contains only three families. 



Family 36, Hippoboscidce. — The most familiar insects comprised 

 in this family are known as " Forest Flies." The common Forest 

 Fly {Hippobosca equina) is a brown species about one-third of an 

 inch in length, and exceedingly annoying to horses, particularly in 



Fig. 154. — Oscinis Cornuta (Mag.) 



the New Forest. The Sheep Tick [Melophagus ovinus) is another 

 well-known example. 



Family 37, Nycteribidce. — These insects are all parasitic on 

 bats, and are commonly known as " Bat Lice." They are wing- 

 less, but have a pair of halteres placed upon the dorsal surface. 



Family 38, BraulidcB, — This family includes only a single species, 



Fig. 155. — Phora Camariana (Mag.) 



which is parasitic upon the honey bee. Its name is Braula cceca, 

 and it is an exceedingly minute creature. 



Tribe VI. — Aph.\niptera. 



The tribe Aphaniptera was formerly considered to be a separate 

 order, but it is now q;enerally included among the Diptcra on 

 account of the similarity in the transformations besides other 

 considerations. There is only one family. 



