494 



Appendix. 



LlFE-HlSTORY AND HABITS. 



The female lays her egg in the fruit by means of a sharp ovipositor 

 usually numbers are laid together. They hatch in from 'two to four 

 days, and the footless grubs live in the pulp, living in varied ways in the 

 different fruits for instance, in apricots they work to the very centre. 

 The maggots live from two to three weeks, and then leave the rotten 

 fruit and pupate in the ground. 



The puparium stage lasts from twelve to twenty-one days. In warm 



FIG. 318. APPLES ATTACKED BY FRUIT FLIES (Ceratitifi). 



[C. Fuller. 



climates the whole life-cycle may take but twenty-eight days, and there 

 are several overlapping broods. 



This pest is one readily spread in diseased fruit, and countries which 

 have taken an interest in fruit cultivation naturally protect themselves 

 against the introduction of this serious enemy. The fact that it is 

 recorded as British must not be overlooked. 



Fortunately, through the great work of Professor Berlese, we have 

 a means of checking the increase of these fruit flies by spraying here and 

 there with a sweet poisoned mixture to kill the flies and so prevent 

 egg-laying and the consequent destruction of the fruit. 



