108 INSECTS INFESTING THE APPLE TREE. 



That the codlin moth infests the peach and ajDricot, I have 

 abundant proof by rearing moths from both kinds of fruit. 



Remedies. — For trees, No. 69; return packages (see Chap. 

 IV), No. 70 ; packages stored from previous year, No. 71 ; store- 

 rooms, sale-rooms, etc., No. 72 ; debris accumulating from 

 preparing fruit for drying, No. 15. 



CHAPTER LII. 



The Apple Maggot. 



( Trypeta pomonella. — Walsh.) 



Order, Diptera ; Family, Trypetid.,^. 



[Eating the pulp of apples, causing them to decay, a white 

 footless maggot which, when fully grown, enters the earth and 

 is finally transformed into a black and white two-winged fly.] 



This maggot (Fig. 82, Plate 1,) may be easily distinguished 

 from the larva of the codlin moth by being entirely destitute 

 of legs. It also differs from the latter in its mode of opera- 

 ting, for while the larva of the codlin moth works for the 

 most part in the core of the apple and vicinity, this maggot 

 runs its burrows in all directions through the pulp ; it also 

 differs from the larva of the apple curculio (Fig. 856), which, 

 like itself, is also destitute of legs, by apparently having the 

 hind end of the body obliquely cut off, the curculio larva 

 having this part rounded. 



The apple maggot usually appears rather late in the Summer, 

 and after reaching its full size — about three lines in length — it 

 deserts the fruit and enters the earth, where it forms a small 

 cell in which to undergo its transformations. It assumes 

 the pupa form (Fig. 83, Plate 1,) in the Autumn, and is not 

 changed to a fly until the following Summer. 



The body of the fly (Fig. 84, Plate 1) measures three and a 

 half or four lines (or from one fifth to one fourth of an inch) 

 in length, and is of a black color, the thorax marked with 

 four whitish lines, and with a white dot next to the abdomen ; 

 the latter is marked with three or four whitish transverse 



