OUTLINES OF ENTOMOLOGY. 89 



roof-like over the body. The eyes are large, the antennae filiform, the 

 palpi broad, tufted and somewhat triangular. The Iarva3 are usually 

 rather soft, plainly colored worms with a heart-shaped head, a distinct 

 horny collar, and horny plate on top of the last joint. The great ma- 

 jority conceal themselves within leaves variously twisted and rolled, 

 from which habit the group derives its name. A few species feed on 

 fruit, among which the universal apple enemy, the Codling moth (Car- 

 pocopsa pomonella, Linn.), is the most notorious. 



The Fringe-wings (TINEID^E) include the smallest insects in the 

 Order. They have slender, lance - shaped wings, bordered by long 

 fringes, and many of them are exquisitely colored in various metallic 

 and prismatic tints. The antennse are simple, and usually nearly as 

 long as the body. The palpi vary in form, but are, as a rule, long and 

 conspicuous, in many species curving upward in front of the head. 

 The Iarva3 are often leaf-miners or case-bearers. Others are destruc- 

 tive to fruit or grain, or feed upon feathers, furs and wool, being the 

 ^clothes moths," against whose ravages it is necessary to protect some 

 of our costliest apparel. 



The Feather-wings or Plume moths (PTEROPHORIDJE) have the 

 wings cleft so that each appears composed of several feathers. They 

 are small insects, only one or two of which are seriously destructive, 

 as for example the Grape-vine Plume. 



CHAPTER XXIII. 

 Order IV. DIPTERA. 



[Fig. 33.] 



Tachina fly (Lydella doryphora) Riley. 



In this Order are grouped the insects that have but a single pair 

 of wings, and a few others that have no wings at all. They are popu- 



