DIPTERA. 485 



The Dung-flies, Scatophaga (Sca-toph'a-ga), are rather 



VII, + IX 



v, + vn i 



FIG. 591. Wing of Callopistria annulipes. 



slender flies, which have the body clothed with yellowish 



hair, and which are com- 



mon, especially about 



fresh cow-dung. They 



belong to the Subfamily 



Cordylnrince (Cor-dyl-u- 



ri'nae). 



To the subfamilies Or- 

 talince (Or-ta-li'nae) and 

 Trypetintz (Try-pe-ti'nae) 

 belong many common 

 species which have the 

 wings beautifully marked 

 with dark spots or bands. 

 In the Ortalinae vein II 

 extends to the margin of 

 the wing in the usual 

 way; in the Trypetinae 

 the outer part of vein II 

 turns suddenly towards 



the margin of the wing, 

 and at the same time 

 becomes much less dis- 



FIG. 592. --The Apple-maggot; i, larva; 2, pupa 

 riuin; 3, adult- ia, head of larva from side, 

 showing mouth-parts and cephalic spiracle; 

 ib, head of larva from below; ic, caudal 

 spiracle of larva. 



